Nice Job Breaking It, Hero/Video Games

Even in video games, where heroes are controlled by the player 90% of the time, the good guys can still screw up and make things worse.

"GLaDOS:"
 * In the Trope Namer Portal, alas, Stupidity Is the Only Option: the very first part of the AI villain destroyed by the protagonist

"Isaac: You've resurrected the castle! *slow clap* Hector, bravo!"
 * Portal may be one large Nice Job Breaking It, Hero, if GLaDOS's claim is to be believed. But then, one must consider the source of the claim.
 * Also implied in "Lab Rat", a tie-in comic that acts as a bridge between the game and its sequel:
 * Ironically, when GLaDOS actually says this, it is not an example of the trope... it is said directly after you destroy one of her vital parts in the final boss battle. She feebly tries to convince you that "it made shoes for orphans".
 * In Portal 2, the player winds up making another one by  GLaDOS of course sarcastically comments on this, never mind that she'd just committed a major whoopsie by.
 * GLaDOS begins the first game as a slightly insane testing computer whose homicidal tendencies are frustrated by Restraining Bolts. Through Chell's efforts, she ends the second game Depending on how future Portal games pan out, this might prove to have been a colossally terrible move.
 * That depends on if she's telling the truth about And if she plans on expanding beyond testing, of course.
 * Alex Mercer does everything to further the villain's plans. Where to begin?.
 * The sequel has him infecting Death Seeker James Heller, which it's not a good idea since he wants revenge on him for the murder of his family and ruining his death.
 * Borderlands: In the DLC The Zombie Island of Dr. Ned, you must eventually fight and kill the eponymous physician, which only leads to his zombification and taking a level in bad-ass.
 * Spider-Man: Shattered Dimensions starts with about as literal an example as you can get with the hero breaking something to kick it off. Spidey shatters the Tablet of Order and Chaos when battling Mysterio and in order to save reality, it's up to Spider-Man, Spider-Man, Spider-Man, and Spider-Man to find all the fragments and fix Amazing Spider-Man's mess.
 * Arc the Lad: Twilight of the Spirits has a very annoying example. The guy whose life you saved at the beginning? The one you get a Game Over if you don't save? Who then helps you out on your quest? Turns out he's the Big Bad all along, and all you've been doing the entire game with both of your parties was being the MacGuffin Delivery Service, just as he planned. He takes them all, and raises the Evil Fortress Of Doom. The world would have been much better off if you had just let the guy die when he was helpless.
 * Xenosaga has an epic example of this. The Gnosis, who've been rampaging throughout the known universe, killing all human beings in their path, and generally terrorizing the galactic community? Guess who summoned them?  It Gets Worse.   This causes her to suffer a Heroic BSOD of epic proportions.
 * In Trauma Team, in the last chapter, we find out that Albert Sartre killed his own daughter to attempt to stop the spreading of the Rosalia virus. Turns out that this allowed the virus to spread from her blood to flowers, to butterflies, infecting a whole city and threatening to exterminate mankind. Nice job breaking it, Doc.
 * The Legend of Zelda is the king of this trope:
 * In Ocarina of Time, Link follows Zelda's instructions and manages to gather up all of the spiritual stones, the ocarina, and the Song of Time in order to pop open the Door of Time and draw the Master Sword... allowing Ganondorf to waltz in and plunder the Golden Land. Actually, you should really blame this one on the Master Sword, for not letting a Kid Hero be the Hero of Time and instead sealing him away for seven years while Ganondorf became King of Evil. Nice job breaking it, sword.
 * And then, at the end of Ocarina of Time, Zelda sends Link back in time to his childhood to prevent Ganondorf's rise to power. This splits the timeline in two, and while Ganondorf is successfully thwarted in the "Child" timeline, Zelda ensures that the timeline she herself is in lacks a Hero, and as such dooms 90% of the population of her Hyrule to death by drowning in the Great Flood. Nice job protecting (your own) Hyrule, princess.
 * And in Wind Waker, the Master Sword held Ganondorf's power in check... and the Master Sword is a shadow of its former self to boot (though it's still more powerful than the Hero's Sword). Nice job protecting the seas, sentient boat.
 * In fact, most of The Legend of Zelda games featuring the Master Sword use this - the Master Sword is a "key" to the Sacred Realm/Golden Land where Ganondorf/Ganon is held captive, and in the process of collecting the sword to defeat the beginnings of his influence, the player releases him fully.
 * Twilight Princess does a fairly good job of not breaking things: although, grabbing the Master Sword actually doesn't unleash some kind of unspeakable evil on the world. Someone else already did that.
 * More specifically, the Sages pulled a good one when they  Link just winds up having to clean up the mess. Again.
 * In Link's Awakening, Link goes through the game defeating the Nightmares, which are creating all the monsters that are rampaging around Koholint Island, and in doing so he collects the Instruments he'll need to wake the Wind Fish so that he can escape the island. Unfortunately,  This is actually shown in a poignant ending scene, while the Ballad of the Wind Fish plays. In fact, the last thing we see is   Nice Job Waking It, Hero.
 * Subverted in that
 * Except that almost all the warnings Link gets (which are not until the game is about 75% over) come from the Nightmares. So let's see: an evil, horrible, murderous entity that's polluting the world with monsters tells you something that would prevent you from killing it (which is otherwise your main goal). Are you likely to believe it? The only other warning he gets is an ancient tablet—which his guide/advisor immediately tells him may not be accurate.
 * IF you finish the game without dying once,
 * In Zelda II the Adventure of Link, the game's story strongly suggests that life in Hyrule has become even worse since the (very) first game, because now, nobody is controlling Ganon's monsters. Blame Link.
 * It doesn't help that of all things, the one thing said monsters can focus on is that by killing Link, they can revive Ganon. So, assuming you fail in your quest (which you probably will, this is Zelda II after all), you get to unleash Ganon BACK upon the world, this time with no Link to stop him. Nice Job.
 * In Oracle of Ages, the first thing Link does is push away the barrier rock that keeps out all evil from Nayru's glade, and leads the villain, Veran (who is possessing Impa's body) in, trying to help her. The second thing that happens is that the Veran kidnaps Nayru, laughs at Link for being so stupid, and makes off with her.
 * In The Legend of Zelda Skyward Sword:
 * Not only does he allow the aforementioned to happen, but in the side quests, he literally breaks a chandelier just to obtain a heart piece,,  , and - worst of all -  . This LP sums it up perfectly, making us wonder if Link is more capable of breaking things than he is fixing them. What the Hell, Hero?, indeed.
 * SaGa Frontier:
 * Dragon Quest Swords. Whoops, the Rorrim mask you just sliced in two was the only thing that prevented Xiphos' return...
 * Also, thanks to the Queen no one ever knew about the mask.Two of the hero's companions are her friggin' son and one of the heroes who helped defeat Xiphos for the first time, and even they had no clue.
 * The Elder Scrolls IV: Oblivion makes use of this trope. The Daedra are perfectly content to sit in hell twiddling their thumbs waiting to pour forth into Tamriel, but until the player takes the steps to advance the main quest, he can spend years of in-game time joining the Dark Brotherhood, becoming Arch-Mage, and just generally ignoring the crisis going on. The moment he delivers Martin to Weynon Priory, though, all hell literally breaks loose and it's not unusual to see travelers on the game's roads getting disemboweled by giant demons. Nice Job Breaking It, Hero.
 * This is more of a Gameplay and Story Segregation due to the game's sandbox nature then an actual plot point though.
 * Although the reason that the situation had arisen in the first place was due to the hero from Morrowind releasing the Heart of Lorkhan at the end of the main quest. This weakened the barriers enough between Nirn and Oblivion enough that after taking out the Dragonfires it was incredibly easy for the Mythic Dawn to pop Oblivion Gates into existence in large numbers (normally it would either be extremely difficult if not outright impossible to create even a very small portal). So overall it's more of a Nice Job Breaking It, Hero on the Nereverine's part rather than the Champion of Cyrodiil's.
 * A more direct example in the main quest would be Jauffre, who takes the Amulet of Kings from you "for safekeeping" before sending you to find Martin. Of course by the time you bring Martin back the Mythic Dawn have stolen the Amulet from Jauffre. Considering the whole point was to get the Amulet TO Martin, Jauffre could have simply NOT taken the Amulet, at which point you would be able to give it to Martin straight away and finish the game in about 1% of the time. Nice job, idiot.
 * Idiot Plot
 * Also used in the Benirus Manor quest. The undead former owner wishes to repent and can only do this if you put his severed hand back on his corpse - which is in fact a Batman Gambit, and releases a (semi-)powerful lich against you and the rest of the town/world etc.
 * This Trope is also shown throughout the later Dark Brotherhood quests, as the player believes that they are killing targets, when in actual fact they are systematically killing off all the Higher-Ups of the Brotherhood. 'Well done Hero, Nice job killing our leader'.
 * Hey, remember how, in Morrowind, the destruction of the Heart of Lorkhan removes the Tribunal's power? Well that means, aside from the earlier example of starting to weaken the barriers which finally break at the beginning of Oblivion, you also
 * Well, it was either the unknown future disaster or the present disaster of a Mad God Physical God turning every living being on Tamriel into an ambulatory mound of magical cancer.
 * And the Tribunal was, anyway.
 * The Golden Sun series has a form of this. In the first game, your party is trying to stop the elemental lighthouses from being lit, believing that they will cause the end of the world. In the second game, you play as a new set of characters who were helping the antagonists of the first game, and the player learns that if the lighthouses aren't lit, the world would eventually erode into nothing. Granted, the main characters of the first game never actually manage to stop the lighthouses from being lit  so this might not count.
 * What might count is the fact that by restoring the lighthouses, you are  He may not gain exactly what he wants thanks to the Wise One, but it leaves a delightful potential time bomb around.
 * It basically let the world be destroyed slowly over time, or risk the world being destroyed immediately. Damned if you do, damned if you don't. They'd break it either way.
 * It's actually theorized by the charters that the whole struggle is one big Secret Test of Character by the Wise One. After displaying the potential pros and cons of Alchemy, alongside the costs of the journey, the characters (and the player) are left to decide if its release is worth the risk.
 * Golden Sun: Dark Dawn brings us the raid on Belinsk, which is a chain of It Got Worse. What began as an infiltration of Belinsk castle (orchestrated by Sveta behind the scenes), ends up a massive detour through the underground ruins to the Alchemy Dynamo. Traps are set off all the way to the entrance of the dynamo facility to keep the party on rails, but nothing compares to the end. Ryu Kou winds up using the Magma Orb hesitantly, only to be forced into going all the way thanks to Arcanus' intervention, and the end result is the raising of Eclipse Tower. Things go straight to hell after you bail Hou Ju and Eoleo out, as the sun rises and, due to the inevitable alignment, harmonizes with the tower to cause the Grave Eclipse. The beastmen who haven't fled are intercepted and killed by monsters in very short order, Volechek stays behind to atone for his erroneous judgment (and this is a ways after we learn that Sveta's his younger sister), and Briggs keeps his ship docked at the port to save the party at the cost of his life. The party - and Ryu Kou - can be forgiven due to the fact that they were railroaded into this. The Tuaparang, on the other hand, cannot. Still, fuck you,
 * And in a more literal meaning of this, one of the main characters breaks the hard-to-make glider by trying to "test" it in the beginning of the game. The other two heroes and the two male kids' fathers have to save him.
 * Alex also made the main characters play right into his hands AGAIN, as by using the Apollo lens, they have just helped to further his master plan.
 * In Metroid Fusion, the Metroids—a species of highly dangerous alien creatures—have been virtually eliminated from their homeworld by the protagonist; it turns out that the Metroids were keeping a terrible shape-shifting parasite in check, and now it's overrun the planet, forcing the protagonist to deal with it. Whoops.
 * To be fair, she was given the mission of exterminating them. She can't be blamed for her employers' Not Doing The Research... or for the Chozo failing to tell her what they apparently created Metroids for.
 * The Chozo may have told her and she forgot, of course. Lectures on the genetic engineering of predator species to balance an ecosystem devastated by a superpredator tends to go over the heads of most young children, as do the component concepts of genetic engineering, ecosystem balance and dynamics, superpredators, and the delicate balance of wildlife management. Chances are, they told her, she responded "kay", and went off to play with a missile launcher and the Zebesian wildlife.
 * The Prime series manages to prevent this from really being considered breaking it. Certainly, the Metroids were integral to keeping the X in check... however, for the past couple of years the Space Pirates had been collecting, breeding, and mutating Metroids and using them as living weapons. During this time, it's made fairly clear that nobody can fight off Metroids except for Samus--possibly because the people who created the Metroids also built her powersuit. Eventually, the Federation probably just threw its hands up and told Samus to wipe them out so the Pirates couldn't use them anymore. That none of them knew about the X is irrelevant: the Space Pirates and the Metroids were presenting a deadly threat on their own. At least the X can't move between worlds without aid.
 * Metroid Fusion also cleverly averts this trope, with the same intent as the failed Metroids above. Samus attempts a Heroic Sacrifice in order to destroy the remaining SA-X on the station. The AI "Adam" stops her, reminding her that there's still more X on the planet below. "How foolish. Even if you are successful in destroying the station, you'll only remove the one thing between the X and total universal domination: yourself."
 * And in Metroid Prime, Samus manages to unseal the entrance to the titular Eldritch Abomination's lair and destroy it....
 * Subverted in Metroid Prime Hunters. Upon finally finding the Ultimate Power, it is revealed to actually be the Eldritch Abomination Gorea. The hunters set it free, only for Samus to immediately kick its ass.
 * Near the end of the old PC game Ultima Underworld, the protagonist finally cuts down the evil Big Bad wizard... only to have the wizard reveal, as he dies, that he's been keeping an invincible demon in perpetual confinement in a chamber below, and with his death the confinement spell will fade shortly, but not too shortly. Now the hero has to run down and find a way to banish the demon for good before it breaks loose and destroys the world. Whoops.
 * Also in the Ultima series, the Avatar does end up being responsible for the eradication of (almost) all human life on both Serpent Isle and Pagan, in Ultima 7.5 and 8 respectively. Also, after the fourth game, the king Lord British has the Codex Of Ultimate Wisdom raised from the underworld, which is the direct cause for the gargoyle invasion in Ultima 6. The other games in the series are simply the revenge of some ally of the previous Big Bad. Ultima 9 does claim that the Avatar's quest for virtue in Ultima 4 was what created the Guardian (Big Bed of games 7-9), but U9 is generally considered Canon Discontinuity anyway.
 * Happens twice in Drakengard 2. First the destruction of the Knights and their seals unleash a red dragon that intends to destroy the world. And then, when you kill the red dragon, it turns out that it was a seal for the dark gods that control the world. And the sky explodes. Whoops indeed.
 * They actually knew that the first set of seals were protecting the world from destruction... but given that the seals required large-scale human sacrifice to maintain, the lead characters decided risking this in order to find some other way was preferable.
 * In ending four of the original Drakengard, the heroes kill the Big Bad, Manah, while she's still the instrument of the gods, killing the gods in the process. Turns out that even though the gods are evil Cosmic Horrors that want to destroy the world, they're also keeping the world in some semblance of order... And without them, giant, flying, plasma-breathing, man-eating babies descend from the sky. Really.
 * In the end of Half-Life 2, Gordon's attempt to stop Breen from teleporting off-world, while successful, results in the partial destruction of the Citadel - so that the Combine decide to sacrifice the Citadel (and thus destroy what's left of City 17) to open a superportal and send reinforcements to Earth.
 * It gets worse in Half-Life 1. Killing the Nihilanth? His death throes amplify the resonance cascade, so the Combine see a giant INVADE HERE sign, so they pop through the borderworld and eventually appear in our dimension. Add to that Gordon had recently launched a satellite that allowed the Combine to open portals all over the Earth AND the fact that he also started the resonance cascade, and it becomes more difficult to cheer him on as the atrocities pile up...
 * Prior to the announcement of the sequel, Half-Life 1's ending appeared to be that . Which is still somewhat of a Nice Job.
 * In Mortal Kombat: Deception, Shujinko spends over 40 years collecting the Kamidogu for the Elder Gods, only to find that he had been serving the Dragon King Onaga all along when Onaga is resurrected. He then embarks on a quest to undo the evil he unleashed on the realms.
 * Later, in Mortal Kombat Armageddon, Argus and his wife Delia are charged with preventing The End of the World as We Know It, setting up their sons and a firespawn of their own creation as the keys to stopping the disaster. Too bad they left their project to run its course unsupervised, otherwise the firespawn wouldn't have been captured and corrupted, one of their sons wouldn't have woken up early with a grudge and slaughtered them, and as a result, their entire plan wouldn't have been the very catalyst of the apocalypse they were trying to prevent. It's called "parental supervision" for a reason, Argus.
 * Don't forget that Argus and Delia created a safeguard against the coming Armageddon, a powerful chestpiece. Argus was going to make it kill everyone, but Delia didn't approve, so instead it was created to randomly either kill everyone or depower them, and you never know exactly what it will do, until it's finally used and  Nice job breaking it, saviors of humanity.
 * According to Taven's ending, . What the bloody hell were the Elder Gods thinking?!
 * It Gets Worse. Rather than having Taven win, Mortal Kombat 9 reveals that
 * Moreso in the actual Mortal Kombat 9:
 * After Freddy Krueger kills Shao Kahn and ends up saving the Earthrealm, Nightwolf recognizes him as a demon and sends him back to the Dreamrealm instead of killing him in the real realm - where he is much weaker...
 * Final Fantasy generally loves this trope, unsurprisingly:
 * Final Fantasy I: Killing Garland in the beginning allows him to take control of the four elemental forces and create the time loop.
 * Final Fantasy II: The heroes kill the emperor, who proceeds to conquer hell, and come back worse than ever.
 * Final Fantasy III: the heroes defeat Xande, allowing the release of the Cloud of Darkness.
 * Final Fantasy IV: Cecil gives Golbez the Earth Crystal in exchange for his girlfriend, which only helps him out in his plan for world conquest. Then they perform another MacGuffin Delivery Service, though to be fair that one was mind-control-assisted. At the end of the game, defeating Zemus causes his leftover hatred to become Zeromus.
 * Final Fantasy V: The heroes have already failed to stop Exdeath from breaking the crystals of their world, and then they go and kill the Crystal Guardians of the other world, letting Exdeath complete his evil plan. Near the end, killing Exdeath turns him into the near-omnipotent destructive nihilist Neo-Exdeath. (Speaking of which, who thinks up these names, anyway?)
 * Final Fantasy VI: Gaining the Espers' trust and bringing them to Thamasa for a supposed reconciliation with The Empire just allows Kefka to massacre them all and become more powerful.
 * Plus, he probably wouldn't have upset the balance of the Statues, thus setting off The End of the World as We Know It, if Celes hadn't stabbed him right before then. (Or stabbed a bit more accurately and finished him off right there, I suppose.)
 * Final Fantasy VII: The heroes retrieve the Black Materia in order to keep it away from Sephiroth, but once it's been unsealed, he just mind-controls Cloud into giving it to him.
 * You also kill Jenova so Holy can stop Meteor, but Holy ends up making things even worse until the Lifestream pops up to save the day. Sure, all this happens in the end cutscene without the player having any control, but unleashing Holy is still this trope, right?
 * Final Fantasy X: Surprisingly inverted, sort of.  Way to actually fix it, hero!
 * Final Fantasy XIII: In Chapter 9,  In Chapter 13,
 * The sequel has this too: That's good right? Wrong!  Oops...
 * Still in Final Fantasy XIII-2,  Oops. Did I mention that   Double oops...
 * Final Fantasy Tactics is more or less a long string of these (as in, you're doing it for most of the game, if not all of it). In particular..
 * Ramza and company saving Algus and Elmdor, both of which come back to haunt you later.
 * Ramza leaving the Zodiac Stones he'd gathered with his defenseless, kidnap-prone sister. At first this seems like a minor oops that only nets the enemy a few stones. Then, during her inevitable captivity, she is found by the bad guys and identified as the perfect vessel to stuff their dead leader into, speeding up their plan by hundreds of years. Granted, there's no way Ramza could have seen this coming, but the act itself was stupid enough to warrant a 'nice job'.
 * Ramza insisting his sister stay in the monastery is another one. She tells him Ramza is a marked man, people know about him and her and will come after. Ramza insists she stay, and surprise surprise, she gets kidnapped by people Ramza could easily beat up. Oh and despite being weak, she has a ridiculously broken buff skill that would have been hugely useful. Nice job....
 * The 'Destiny Odyssey' section of the primary storyline of Dissidia Final Fantasy revolves around each hero character from the first ten Final Fantasy games overcoming their respective adversaries to acquire a crystal. Turns out that each crystal contained a portion of Cosmos' power, which weakened her enough to allow Chaos to kill her. Whoops. Granted,, but a bit of a heads-up might have been nice.
 * An extremely common way of ensuring yourself a sequel. One example is Dungeon Siege 2.
 * In Guild Wars, you join the White Mantle and help them located gifted people... only to find out they're using them as human sacrifices. You then gain the power to combat the Mantle and their gods by allying with others... only to have your allies release something worse to kill the gods. And then, in finally ending the situation, you cause a volcano to explode.
 * Paralleling the above events was how you essentially fumbled about with the Scepter of Orr throughout the game. First the Mantle located and rescued it from the grasp of the Lich Lord, which was good. Then you stole it from the Mantle, which was also good since who knows what they would have done with it. Then you give it back to the Lich, though you didn't know at the time. And it turns out the Lich needed the Scepter to defeat the Mantle's gods... by unleashing even worse beings.
 * Not to mention when you free Palawa Joko, since he's going to conquer the place about half a century after Nightfall takes place (as revealed in The Movement of the World, an article about GW2). And seeing as the first thing he does after honoring your bargain is to start rebuilding his armies, you know what he's going to do.
 * Technically, you didn't release him; he broke free himself due to the weakening of reality. You were going to do it anyway, but still...
 * Although Zhed pointed out that, even after your team-up, it would've been smarter to put the guy who almost destroyed Elona once back where you found him. Nice job honoring your bargain, hero.
 * All of the events of Nightfall took place because Kormir, the greatest hero of the Sunspears, did everything she was supposed to not do. And her reward for nearly destroying the world and getting hundred, if not thousands, of innocents brutally murdered in the crossfire is.
 * There are a lot of smaller examples, too.
 * After beating the Final Boss in Secret of Evermore, it's revealed that the hero's actions have disrupted the world's balance of good and evil, and the world will effectively implode unless it's fixed. Whoops...
 * In Prince of Persia: Sands of Time, the Prince activates the palace's traps, only to realize too late that they will do absolutely nothing to hinder all the monsters running around and will only make his life more difficult. His Genre Blindness is lampshaded midway through the activation sequence when he asks the palace guardsman who told him to activate the defense system what, exactly, it's going to do. The guard responds that he told him, it'll activate the defense system. The Prince doesn't ask for clarification.
 * Not to mention releasing the Sands of Time in the first place. And causing . And then.
 * And . And then . Sands of Time trilogy is definitely built around this trope.
 * In the 2008 game, (another) Prince spends his entire time sealing back up an evil in a can and at the end decides to unleash it again and undo all that hard work.
 * Subverted Trope: As explained in the epilogue, he had an excellent reason for doing that. Elika sacrificed herself to seal Ahriman away again. The problem with this is that seals can break, as was proven at the very beginning on the game. This seal will break again, and when it does, the one thing capable of truly destroying Ahriman—the power inside of Elika—won't be around to stop him. By unsealing Ahriman again on the condition that Ahriman resurrects Elika, the Prince has given the world a chance at getting rid of Ahriman for good. It's more of a potential Nice Job Fixing It, Villain in Ahriman's case for reviving Elika in exchange for his own freedom.
 * In Persona 3, the twelve shadows SEES went out of their way to destroy turn out to have been keeping the Anthropomorphic Personification of death sealed away. And yes, now it's awake and going to destroy the world, and a bunch of high school kids are going to have to try and stop it. It doesn't help that a particularly well placed Chessmaster orchestrated the whole thing.
 * There's an even crueler one in Persona 4. Nice job saving your friends from dying inside the Midnight Channel, hero!  And now they've gotten so overzealous about the whole thing that   Heck, your entire team can invoke this further if you
 * Nice job killing Hitler, Einstein.
 * Nice job killing Einstein after he killed Hitler, Cherdenko.
 * Nice job blowing up Temple Prime, Boyle.
 * Nice job rebuilding CABAL, Kane.
 * Nice job detonating a Liquid-T bomb in the Italian Red Zone, commander.
 * Nice job invading Earth, Foreman.
 * Since when was the Scrin a "good guy" with regards to Earth?
 * He isn't. He is, however, a "good guy" with regards to the Scrin. By aborting an invasion that was doomed to failure, the Foreman prevents massive loss of Scrin (and Human) lives. If anything, it's the Foreman's superiors who 'broke it' by ruining centuries of planning by falling for Kane's trick.
 * The majority of Assassin's Creed involves Altaïr killing various Templars who mostly are, in one way or another, helping and protecting the people of the Holy Land, in intention anyway even if they have committed various atrocious acts, even as he himself is trying to save the land by killing them.
 * The real fun part comes at the end, where
 * In the flash game, Fishy, you play as a fish with the goal of eating smaller fish, gradually becoming larger as you do so. If you go on long enough, the game abruptly ends, informing you that you've destroyed the pond's ecosystem by eating everything. Whoops.
 * In Haven: Call of the King, Haven spends most of the game trying to find a mystical golden bell that will summon the warrior King Athelion to save Haven's people from the tyranny of alien overlord Vetch. Haven reaches the bell and rings it. Shortly thereafter, his friend Chess calls and says she's been captured by Vetch, so Haven, thinking "My work here is done," heads off to save her. Then we find out that Nice Job, Haven.
 * Done double duty in Lunar Knights. Dumas was ruling over the planet using Casket Armor, the paraSOL, and bottlenecked humans all in an attempt to protect his own people from the paraSOL's Planet Eater functionality; Lucian and Aaron taking Dumas down gives Polidori a reason to fire it up. Furthermore, after taking down a simulacrum of Polidori at the very top of the Vambery, a freshly revived Dumas warns them that what they just did was akin to starting a war with the Immortals, an entire race of Omnicidal Maniacs. I want my sequel, Konami.
 * Played with in the Mega Man Zero series. In Zero 3, Zero forces Copy X to go "all out," but instead of activating his ultimate form he instead activates a bomb that was planted in his body by Dr. Weil. Results: everyone thinks Zero retired Copy X and Dr. Weil takes over Neo Arcadia, as an even less benevolent ruler.
 * Before that, there's Ciel, effectively the series' female lead, responsible for.
 * Star Fox 64 uses this trope in one area. When you destroy the first 4 weak points of the Meteo boss, the rear laser cannon/shield breaks off... and flies straight at you.
 * Subverted in Infinite Undiscovery. Upon killing the final boss, Veros, . Subverted in that, despite granting awesome magic powers their owners, everyone who has one is.
 * The ultimate focus of Brave Fencer Musashi: you spend the game running around collecting the scrolls that the original Brave Fencer Musashi used to seal a dark wizard with the sword Lumina. You do this to power up the sword in the hopes of stopping Thirstquencher Empire's bid for world dominance, only to find out that the original Brave Fencer Musashi didn't seal the dark wizard with the sword, but in the sword, who was then released. Pat yourself on the back, Musashi, you earned it.
 * Well, in all fairness, Allucaneet Kingdom is the mostly at fault for this, due to not properly recording just how the last Brave Fencer sealed away the Dark Wizard. Saving the kingdom is one thing, but releasing a planet-ending threat is not a good trade off.
 * Especially considering that Musashi never really had much interest in gathering the scrolls. If they'd just set him loose on the Empire itself, he probably would have curbstomped Flattski soon enough to avoid most of the woes that befell them during the game.
 * The final boss of the World of Warcraft dungeon "the Blood Furnace" is overseeing the efforts of the dungeon's fel orc residents to keep a powerful demon lord confined so they can suck his blood away. He attacks you, yelling that you're "ruining everything." When you kill him, his last words are: "Good luck... you'll need it." (Luckily the demon is in his own separate instance beneath the floor grating.)
 * Also in Shadowmoon Valley—the quest chain that leads to the resurrection of Teron Gorefiend. Whups!
 * Also the Shadow Labyrinths—the Cult you just killed there was fending off a Cosmic Horror (Murmur). Although, this time, you get a chance to kill it right then.
 * The entire Hakkar questline, starting in Tanaris and leading you around the world thrice and through three instances, has you resurrecting the blood god, revitalizing the evil troll empire, and finally re-defeating him with a raid.
 * The first campaign in Warcraft III's expansion set is even worse. The player takes control of a group of night elves on their quest to stop the traitor Illidan from killing the Lich King and ending the undead threat once and for all.
 * Except that, as revealed in "Wrath of the Lich King," merely killing the Lich King WOULDN'T end the undead threat once and for all; in fact, Ner'zhul was holding the undead in check, and his death would have made the undead an even greater threat.
 * Admittingly, Illidan's plan was to destroy Northrend in the process, an equal example of the hero breaking it.
 * To make Illidan's actions seem even less heroic, he was doing them at the behest of a greater evil, and destroying Northrend would have seen to the entire planet splitting open. Not as heroic as great as a lot of people initially think.
 * Illidan's dialog seems to indicate that he wasn't aware of the full damage the spell would cause. Illidan has a history of not thinking things through.
 * This far and nobody's brought up the best gem in the gameworld? "Upon further analysis of the Gnomeregan situation, it would appear as though we not only failed to eradicate the troggs but we also happened to turn most of the gnomish race into horrific, mindless, evil-doing leper gnomes..."
 * Drakuru plays you for a chump while locked in a cage, using you to take down the Drakkari Empire and clear out their stronghold.
 * Whereupon Drakuru
 * Apparently when we killed C'thun, we risked destroying the planet because the Old Gods tied their existence to the survival of Azeroth. And now we're going after another one, fully aware of this possibility.
 * To be fair, the Titans made it kind of a lose-lose situation. Kill the Old Gods and destroy Azeroth...or let them break free, thus enacting Algalon to annihilate all life in order to keep them from destroying more than JUST Azeroth.
 * Well Arthas, it seems trading your soul for power to get revenge and save your kingdom turned out to be less of an awesome idea and it seemed. Especially since Mal'Ganis didn't actually die.
 * Warcraft really likes this one. This one depends on whose side you think is the hero and who is the villain, but Daelin Proudmoore declaring war on the Horde? Not a great idea. Not only did you get yourself killed, you pissed off the Horde, and when they killed you that pissed off the Alliance because you were a war hero. Oddly enough, the leader most affected (his daughter) actually helped take him down and is still the one most devoted to peace.
 * This happens similarly with the controversial Alliance attack on Camp Taurajo. General Hawthorne attacked and sacked the Tauren village, a "soft" target that had value for the war effort, but allowed openings in his lines to allow some civilians to escape, but Horde players and characters contend that this was not enough, as there were civilian deaths. A Horde questline leads players to kill him, which leads the Alliance to launch an attack to avenge him. Either the General's attempt at mercy backfired, or the Horde, by killing the person who attacked him, opened themselves up to worse retaliation.
 * Most recently, by killing the corrupted Watcher Loken in the Halls of Lightning, the players accidentally set in motion a process to get the Titans to destroy and rebuild Azeroth. Oops.
 * And that's after you helped him imprison his uncorrupted brother, thinking all along that you were helping the brother.
 * In a "It Seemed Like a Good Idea At the Time" moment, in one quest chain in Burning Crusade, the players help Orcish leader Garrosh Hellscream get over is depression and grow to become a leader. And, Ã­n the next expansion, Wrath of the Lich King', he's a bloodthirsty maniac who's trying to restart the war with the Alliance and might be out to replace the Orcish Warchief, Thrall. And he's only in the position to do this because of the players' intervention.
 * As of Cataclysm, Thrall has been forced into stepping down as Warchief in order to commit himself fully to finding a way to keep Deathwing from wiping out Azeroth. No prizes for guessing who filled his position.
 * In the fourth expansion, Mists of Pandaria, its been announced that Garrosh will go mad with power and become the expansion's Big Bad.
 * There are a number of quest lines in World of Warcraft that operate on this trope. Probably one of the earliest ones encountered belongs to the Night Elves. In your first few levels you encounter a satyr who just wants you to go kill a few animals and bring him back some of their bits and parts. After completing this quest, you get another quest after it's explained that you really kinda probably shouldn'ta done that because that satyr is really up to no good. So you wind up turning him into a frog. It's a very short quest line and isn't terribly fleshed out, but sets up a pattern for you being tricked into actions that result in rather negative consequences throughout the game. You just never learn, do you, Hero.
 * It's surprising that no one bothered to mention good old hermit Abercrombie from a certain Duskwood quest chain. While it seems you're just doing simple favors for a kindly old man, you eventually find out you've helped him build a Level 35 Elite abomination named "Stitches" who runs along the main road towards Darkshire killing any low-level players in his path. Do the same quest with another character, making sure to read the quest text this time, and you'll see how obvious this outcome was.
 * The Horde quests in Tirisfal Glades and Hillsbrad revolve around making a plague supposedly to use against the Undead Scourge. It is later revealed in Northrend that this was not the case as the plague was unleashed on the living as well at Angrathar: The Wrath Gate.
 * To be fair, the NPCs never actually said it wasn't going to be used against the living, and drop a few subtle (and sometimes not-so-subtle) hints about their goals.
 * In addition, a quest in Stonard has you putting together ingredients for a truth serum crafted by one of the Forsaken Apothecaries who's making this New Plague, so you can get information out of a captured human. Turns out the human wanted to give the orcs and other Horde leadership information on the Apothecaries' plan to create a new plague... and the truth serum you just fed him was actually just poison. Oops.
 * An early Dragonblight quest chain has you attacking outposts of the Blue Dragonflight, beating up their human sympathizers one by one and trying to figure out what they're doing the local magical ley lines. On the body of one of their leaders (which one it is depends on your faction) you find a half-finished letter revealing that
 * The entire Wrath of the Lich King expansion is leading up to a massive, epic battle against the Lich King. When your raid group finally reaches the top of Icecrown Citadel and takes the Lich King down However,   It turns around twice more, though, in the ending cutscene, when   And   even LOOKS a bit like.
 * This trope comes into play in the quest chain that opens the Molten Front, although you're an Unwitting Instigator of Doom instead of an Unwitting Pawn. Shortly before the attack begins, Hamuul asks you to investigate a Druid of the Flame nearby. The druid, Leyara,, forcing you to delay the attack until you have enough Marks of the World Tree.
 * Dhaos, the Big Bad sorcerer from Tales of Phantasia, wages war against the world in general across several generations with the aim of taking a Mana Seed from the Tree of Life. It isn't revealed until after you've finally killed him that he was actually a being from another planet, on a mission to replace his world's own Tree of Life, which is dying. Oops. After everybody else is gone, though, the resident goddess transforms his body (and hers, too, depending on which version you play) into a Mana Seed and sends it on its merry way, making one wonder what the fuss was all about.
 * Midway through the game a human army, desperate to fight off Dhaos, unleashes an enormous mana-sucking weapon which has the unintended (but totally predictable) effect of killing off our Tree of Life. It's a little uncertain whom the bigger "oops" is on here, since Dhaos' whole war was about preventing humanity from bleeding out all the mana with their excessive use of sorcery. Nice job on that one, eh?
 * The Magitek cannon backfired on its second firing and destroyed a good portion of Midgards. Dhaos was sure that Lyzen wouldn't be a massive idiot and fire it before it was ready.
 * In Tales of Symphonia,  Ironically, they use a mana cannon to defeat him, and it is implied that it was mana cannons' use which led to him taking over the world in the first place.
 * Why people keep using the damn cannons if the technology has over 8000 years of history of causing death, destruction, and suffering to all (including its users) is never addressed.
 * Tales of Symphonia is full of this. Your heroic quest to save the world by reviving the flow of mana turns out to  Of course, when you are nearly finished in your quest, but haven't touched Disc 2 yet, you know something's up.
 * It's sort of subverted in that
 * On a more personal note,  This leads to your first Disc 2 quest.
 * It even gets worse: having moved on to  And you know that something's even more wrong when you've almost finished your second world-saving quest and STILL haven't touched Disc 2. Yes, you read that right.
 * Technically that's more Nice Job Not Fixing It Completely Hero, since . Their only mistake was believing that defeating him was all they needed to do to save the world, when it was only the first step.
 * In the first part of the game, Genis' visiting Marble at the human ranch is seen as a violation of the non-aggression treaty when Lloyd gets caught on camera killing the guards that saw him, enabling the Desians to attack the village. To make matters worse, Marble is turned into a monster, and sacrifices herself to stop Forcystus.
 * And Nice Job Breaking It, Renegades, for taking an eternity of slapfighting back and forth before they informed their "enemy" that THEY WERE ON THE SAME SIDE.
 * It could also be argued that the entire game is a severe case of this,
 * Even the sidequests aren't immune to this. One sidequest has the heroes dealing with a family who lost a child when . In fact, that was the same incident that also killed  . Nice job ruining people's lives, heroes. Another example has the heroes helping Abyssion lift his curse by looking for the Devil Arms and having Abyssion dispose of them. Turns out that  . Nice job unlocking the hardest boss in the game, heroes.
 * In the sequel, reuniting the two worlds in the first game has the effect of the major kingdoms about to declare war on each other.
 * Averted in the sequel by meaningful relationship development, because if  But there is a Heel Face Turn which neatly averts the trope.
 * The villain-throwing-a-parting-shot version is used in Fire Emblem 7, when Nergal uses his own Life Force to summon a dragon to cause The End of the World as We Know It.
 * Played for tragedy twice with poor . First, the gang finds her adrift at sea with memory loss and takes her to Dread Isle...   Later, Eliwood goes through a cave full of lava patches to get the legendary Durandal, a sword that kills dragons.   You really should have planned things better, heroes.
 * And then there's this little kicker. If you, as the game's tactician, did exceedingly well when you finish the game (A-S rank), your legacy causes Bern and Etruria to go war because they desired your skilled mind so much. That's right, that S-Rank Hector Hard Mode you spent weeks over caused two of the most powerful military nations to go to war over you. Opps!
 * Early in Phoenix Wright Ace Attorney: Trials and Tribulations, Phoenix proves his client innocent of theft... with an alibi which implicates him as a murderer. Whoops.
 * In Phoenix Wright Ace Attorney: Justice For All in the last trial, Phoenix's work in clearing Matt Engarde of his charges very nearly implicates a completely innocent witness in the crime, to the point where it takes  to actually prove who was the real murderer..
 * In Phoenix Wright Ace Attorney case 5, the same detective was apparently stabbed to death in both the prosecutions building and the detective's prescient at the exact same time. Phoenix works his ass off finding fingerprints, getting info, and cross-examining people as well as pointing out contradictions in a video tape in order to prove that, which he does... this, however, proves that the and therefore the only person who could have killed the victim was his client... good job there Phoenix!
 * In both Super Robot Wars Original Generation games, the act of defeating the alien invasion leader activates a failsafe device that tries to destroy the entire planet.
 * Also, in Super Robot Wars Alpha, You fight the Battle of the Solar System's Absolute Defense and detonate a battleship in the midst of the Horde of Alien Locusts headed for Earth. In Alpha Gaiden'', you find out that the shockwave of that detonation is going to devastate the Earth all by itself.
 * In the Neo Geo Pocket version of SNK vs. Capcom, the bosses (the usual Geese Howard and M. Bison) unveil a clone of Iori or Ryu, whom they intend to be the first of their powered-up slaves for their world conquest scheme... and your team will be next. Once you defeat Geese and Bison, you discover that your fight caused the clone, an Orochi Iori/Evil Ryu, to be released. And, of course, the 2 cowardly bosses are leaving YOU to stop him. "Enjoy the wrath of Orochi blood!"
 * In Treasure of the Rudra, during Sion's Scenario he is stuck on the Sky Islands and wants to return to Terra Firma to stop the Rudra Cult. However when he does activate the path back to Terra Firma, the entire archipelago falls, putting everyone at risk of being killed by the Rudra.
 * Said Archipelago was part of the Earth in the past anyway.
 * In Castlevania: Curse of Darkness, Hector's defeat of Dullahan turns out to be a vital step in Isaac's plan to resurrect Dracula a century early.  Lampshaded:
 * In Castlevania: Curse of Darkness, Hector's defeat of Dullahan turns out to be a vital step in Isaac's plan to resurrect Dracula a century early.  Lampshaded:

"Party: Yay! We stopped Magus from creating Lavos! Magus: No! I was summoning Lavos so I could kill it, and you only let me finish the summoning part! Player: Oops!"
 * Two of the four possible endings of Castlevania: Symphony of the Night involve an underinformed Alucard eliminating the Belmont bloodline by beating the stuffing out of one extremely possessed Richter. Seeing as the Belmonts are humanity's best and perhaps only hope in the fight against Alucard's infamous father... Oops.
 * In Castlevania: Portrait of Ruin's true ending path Brauner  AT THE SAME FUCKING TIME.
 * Castlevania: Order of Ecclesia does this too, doubling as a Nonstandard Game Over:  Whoops.
 * Kirby has been known to pull this on occasion.
 * In Kirby's Adventure and the remake Nightmare in Dreamland, Kirby defeats King Dedede and his henchmen, repairs the Star Rod, and puts it in its rightful place on the Fountain of Dreams... where it gives the Nightmare hiding in the fountain the strength to emerge, and Kirby has to beat that, too. Oops.
 * And in the true ending of Kirby: Squeak Squad, in his quest to recover his cake from the titular thieving band of mice, he defeats every villain in his path, recovers all of their stolen treasures, and opens a sealed door in his path. In front of him is what seems to be the last of their chests, the one that must contain his cake. Oops, turns out it's not one of their chests at all, but a coincidentally identical prison for an ancient evil.
 * This decision becomes even less intelligent by the fact that he continued to chase THAT PARTICULAR CHEST thinking there was cake in it even after Meta Knight stole it from him just before he could open it. After all, Meta Knight just LOVES stealing strawberry shortcakes from people.
 * In Kirby Super Star, Kirby goes out to awaken NOVA, a mysterious cosmic clockwork entity, so that he can wish for the Sun and Moon to stop fighting. Then  knocks him aside. Turns out   Crap. Then again, the Sun and Moon stop fighting so they can hold Nova off...
 * In Star Ocean the Second Story, your team investigates the Eluria Tower to find out about the demons that are attacking all the towns. Too bad that you accidentally bring the key to the "Sorcery Globe" with you. The result? Instead of the planet Expel being destroyed centuries from now, it gets destroyed immediately. Whoops.
 * To be fair, the mere existence of that key on the same planet caused that acceleration. (Bringing the key closer just made it worse.)
 * After you save at the final save point before Indalecio, do not initiate the Private Action with Filia unless you want to fight an Unstoppable Rage version of Indalecio that forces you to trap him. If you don't, he'll slaughter you.
 * In Star Ocean: The Last Hope, on the mirror 1957 A.D. Earth, Edge hands over his ship's 100% clean energy source (exilithium), to Milla Bachtein (who by the way has captured Reimi, and has been performing obviously bad experiments on various lifeforms and extraterrestrials) to study in hopes of preventing the discovery of nuclear energy which would lead to nuclear weapons and World War III, causing the surface of Earth to become uninhabitable. After you hand it over, Nice job preventing World War III.
 * Subverted in the final battle of Eternal Darkness. The player has to use the Villain's giant Circle of Power (which he had used to unseal his Canned Evil, Big Bad Elder God) to summon the Canned Evil God that trumps him/her/them/it, stalling the first one and letting the heroine deal with the villain himself. Upon offing him, she realizes that the god she had summoned is just as Big, just as Bad, and just as in need of resealing, at which point the grandfather (also controlled by the player at this point) finishes the job.
 * ...Then possibly un-subverted with the 100% ending. Playing the game 3 times, destroying the 3 different gods, was just a Batman Gambit by the 4th god so that he could destroy the gods he was supposed to prevent from running rampant, in order to enact some kind of plot. He's already been condemned to a slow, agonizing death, and it's not made clear whether the plot is actually something bad from the ending, so it's unclear if it's returned to being played straight or not.
 * The RPG Enchanted Arms takes the "Way to Go, Serge" rule and runs with it. You're being manipulated to do exactly what the Big Bad wants you to up until the VERY last part of the very last boss fight. Destroying the evil creatures that were killing everybody was exactly the WRONG thing to do. And if you're wondering why this troper didn't put that in spoilers, it's because the game itself spells it out for you. Constantly. From pretty much the very start. You're just not able to do anything about it.
 * Do be fair, Atsuma is an Idiot Hero of quite high degree. In fact, in one part you're given the option of saying the thief is small, light, and nimble, or that he/she trains mice. No joke.
 * In Mario & Luigi: Superstar Saga, Lady Lima demands that the Mario Brothers prove their identity by repairing the castle's plumbing. That was actually Cackletta in disguise, and the broken sewer system was the only thing keeping her from getting into the Beanstar chamber. Nice job fixing it, hero.
 * In addition, the brothers went on this quest to recover Peach's voice... which was never stolen in the first place, thanks to an early Batman Gambit on the part of the other protagonists. Unfortunately, they only got there due to an Enemy Mine from Bowser, and the villains take advantage of his presence to make things much worse... of all the times to try to be helpful...
 * In the sequel, Mario & Luigi: Partners In Time, the titular brothers and their infant companions gather up the pieces of the Cobalt Star, only to realize that the star is actually
 * Averted earlier in the game. The brothers rescue Princess Peach, only for Bowser to kidnap her again, prompting the brothers and babies to go after her again. Then it turns out that.
 * Also used in Paper Mario: The Thousand-Year Door, by way of falling into a Xanatos Gambit. The Crystal Stars are the key to unlocking the Thousand-Year Door... and Mario ends up bringing all seven to the door after being told that it had opened on its own due to the thousand-year cycle having passed. It hadn't, and as soon as they find this out, the ally that told them otherwise was revealed to be Doopliss in disguise and the villains come out and open the door. Nice one. (The Xanatos Gambit was that the last Star was already in the villains' possession, and they would get the Crystal Stars regardless of who won the battle.)
 * Warhammer 40,000: Dawn of War ends with Brother-Captain Gabriel Angelos destroying an artifact containing a demon... which, instead of destroying the demon with it, let the demon go. The demon merrily thanks Gabe for his help.
 * From his words it seems that he destroyed the artifact knowing it, so he could destroy the demon completely later.
 * Apparently he wasn't in a hurry to do that, because the demon managed to corrupt the chapter master, plunge the whole sub-sector into meatgrinder and (in all but one campaign) murder Angelos himself before being killed by some other guy.
 * In Warhammer 40000 Space Marine, Captain Titus and his 2 comrades helped Drogan activate the experimental weapon Psychic Scourge, in hopes of turning the tide of war against the Orcs. However, the weapon ended up opening the warp gate for the forces of Chaos to pass through, creating even more havoc for humanity.
 * In Star Control 2, the Shofixti blew up their own star to take down a massive Ur-Quan fleet. That's great and all, considering they've been enslaving everyone up until that point. That is, until you find out that the Ur-Quan's genocidal cousins are coming to this section of the galaxy, and the Shofixti had crippled the enslaving Ur-Quan's fleet enough so that they'll lose the upcoming doctrinal conflict.
 * Don't forget that in order to finish the game, you have to kill off two races. It would be an Inferred Holocaust if it wasn't for the fact that there's no inferring to it. Then again, both were on the villain's side, and both were Exclusively Evil.
 * Well, you don't HAVE to. In both cases, getting the race to go get itself killed is only one of several ways to get what you need. Anyway, just because the race is no longer a galactic power doesn't mean every single individual is dead...
 * Played very effectively in Baldurs Gate II with Bonus Boss Kangaxx the demi-lich. He asks you to retrieve his body, which was torn apart, but not destroyed, and hidden under the city. When you do so, he "rewards" you by making you the first people he kills. Then, if you destroy him, his skull floats up, cackles madly and declares he's now stronger than ever. He gains insane damage resistance and can cast game-ending spells without limit on the party. The resulting battle is essentially impossible without prior knowledge, either in Guide Dang It form or of the standard powers of Dungeons & Dragons demiliches.
 * What you need is a scroll of Protection From Magic and some kind of insanely powerful weapon, like Crom Faer or Carsomyr.
 * And this pales in comparison to And somehow, even that isn't as bad as
 * Not as devastating as you think because
 * Another BioWare example, but the "heroes" are pretty arguable. In Jade Empire, the Brothers Sun save their empire from a crippling drought . Unfortunately, said deity and followers were also in charge of , essentially damning the Empire to a slower, nastier death... and leading the middle brother onto one hell of a Xanatos Gambit to try and force order back onto creation.
 * Chrono Trigger:

" '"
 * It was probably for the best. It's implied that in the original timeline (where no-one intervened), Magus only succeeded in getting himself killed by Lavos.
 * There are two particular sidequests in Trigger worth mentioning. One is helping a woman grow a lush forest from a desolate wasteland, and the other is making a family drill into their descendants the importance of sharing. This sounds all good, but it turns out these actions made Guardia's neighboring kingdoms strong enough to take over, and in turn, kill the main character.
 * Chrono Cross, aka 'Nice Job Breaking It, Hero: The Game'. Not only was it bad enough in the main game to get The Grand List of Console Role Playing Game Cliches entry named after it, it retroactively did this to the first game's ending. It turns out that the Chrono Trigger heroes, by meddling in the Zeal Kingdom's time line, caused Schala to be absorbed by Lavos, becoming an entity that would eventually evolve into the Time Devourer, a being that would then proceed to consume all of time and space.
 * To get across just how bad this is: by defeating Lynx at Fort Dragonia, Serge wounded him, at which point he swapped bodies with Serge, leaving Serge in a weakened form. The player then goes through hours and hours of Humans Are the Real Monsters philosophizing in order to destroy FATE, at which point he discovers that FATE was the only thing preventing the Dragonians coming back and erasing humanity from existence. That's right, the solution to the first Nice Job Breaking It, Hero is another Nice Job Breaking It, Hero.
 * It gets worse. It turns out the Dragon God is (more or less) an extension of the Time Devourer, and defeating it hasn't fixed anything. Moreover, trying to kill the Time Devourer will just result in another NJBIH, thanks to its nature.
 * To be fair, it eventually turns out that these incessant Nice Job Breaking It Heroes are in fact a giant Gambit Roulette orchestrated by the Guru of Reason, who predicted that all of these events had to take place in order for the heroes to obtain the trinket that would fix the Nice Job Breaking It, Hero the Chrono Trigger heroes caused.
 * Sly Cooper 2 has a headslapper of an example. Bentley tells you to invert a set of magnets holding up the separated parts of Clockwerk, since if his calculations are correct, the resulting force will tear them apart. Turns out that when you Reverse the Polarity, the parts weld together inseparably. Crap.
 * Nice job fixing it, hero.
 * In StarCraft after you help Arcturus Mengsk overthrow the Confederacy, he crowns himself the emperor of Terran space and becomes just as bad as they were.
 * Preventing this becomes one of the major plot points of SC 2, after it is revealed that the heroes must not kill the Big Bad Kerrigan, as she's ostensibly the only one who can stop the Bigger Bad from annihilating all life in the galaxy, like he does in the Bad Future.
 * In Samurai Warriors 2, in Saika Magoichi's story it's revealed that the bandit attacks are caused by Nobunaga's assassination (at Magoichi's hands), since he had kept order (and presumably bandit suppression) up while alive. Sure, Nobunaga massacred Magoichi's village for his unit being so dangerous, but...
 * In Metal Gear Solid 1, when you finally insert the last keycard (after changing the shape of the card three times using different temperatures) into the last terminal in order to disarm Metal Gear REX you actually end up ARMING the machine. Nice job, Snake. But it's not all bad, because then you get to destroy it manually (plus, the only reason he armed it was because of misinformation that was implied to have even most of his support staff fooled). In the fourth game,
 * Many of the other negative effects are avoided, but the is directly stated to have occurred. It is blatantly demonstrated in the FROGs.
 * Plus, Drebin implies afterwards that
 * In the first and second game, Solid Snake's actions in regards to destroying Metal Gear resulted in a mushroom cloud as well as an earthquake in the aftermath of the explosion in the Galzburg region of South Africa are considered this. Even moreso when, according to Kyle Schneider, the aforementioned mushroom cloud was actually from NATO's air raid bombing of Outer Heaven that resulted from Snake destroying Metal Gear, and not its self destruct device going off, highly qualify as a Nice Job Breaking It, Hero moment. The fact that he also killed Big Boss in Metal Gear 2: Solid Snake as well as severely wounded Gray Fox to the point that he ended up experiment, resulting in him being targeted by a governmental bioweapon by Gray Fox's vengeful adoptive sister also qualifies as well.
 * There's several layers of this in Cave Story:
 * Midway through the game, the hero and Curly attack a huge spherical creature and nearly destroy it. Said creature is the core that keeps the floating island in the sky. A last-second save of the core by Misery and the Doctor keep this NJBIH moment from coming full circle.
 * Later, after defeating the evil Doctor who had subjugated the floating island and its inhabitants as bearer of the Crown, the hero discovers he has merely freed him from his corporeal form, allowing him use the full power of the Red Crystal, and possess and corrupt his friends, and the island's core. Cue the real final battle with the Doctor.
 * Defeating the Doctor at this point means destroying the core for good—if you flee the sinking island at this point, then the end cutscene gives several slow pans over areas of the island, and all the people still inside, before the island crashes, killing everyone inside. Way to go. But if you completed the right sidequests by this point, then you can enter the Bonus Level of Hell and fight the Perfect Run Final Boss—defeating him will save the island from destruction.
 * In the finale of Diablo, the hero takes the soulstone containing Diablo's spirit of pure evil and jams it into his own forehead, intending to contain the spirit within him. He fails spectacularly as Diablo consumes his soul, takes over his body, ravages the town of Tristram that the hero spent all of Diablo trying to save, and becomes the villain of Diablo II.
 * To be fair to the hero, by that point Diablo had already long since managed to subtly corrupt and influence him to the point that shoving that shard into his head seemed like a good idea. It's even brought up as a plot point in the second game, that Diablo's powers were strong enough and woven throughout the whole labyrinth enough to corrupt all the strongest heroes that went into it.
 * Also Tyrael destroys the worldstone in the final cinematic. He does realise this may make matters worse. Diablo III, anyone?
 * Even before D3 has been released, one effect of the Worldstone's destruction is known, from the map on the D3 website. The Arreat Summit, tallest mountain in the world, container of the Worldstone, as well as all the people who live there, has been renamed the Arreat Crater.
 * And that's not even Tyrael's first screw-up. Using the soulstones bound the Prime Evils, sealing them away... and making it possible for them to escape pretty easily a few centuries later. Who gave him the idea? Izual, an angel tainted by Diablo.
 * In Call of Duty 4, the United States sends in a Marine expeditionary force to dethrone Al-Asad, the dictator of Qurac. They succeed, easily steamrolling over Al-Asad's army, but his defeat only results in him detonating a nuclear bomb in his own capital, destroying a good sized chunk of the country, along with most of the U.S. expeditionary force (including the player character).
 * This is justified for two very good reasons: 1) The U.S. expeditionary force does steamroll over Al-Asad's army easily, and it can be assumed they would have controlled the capital in a matter of hours after the initial invasion, gaining control of the nuke at the same time (given the Shock and Awe nature of the attack, this was most likely the objective), and 2) who's crazy enough to set off a nuclear bomb in their home turf, killing themselves in the process? Generals planning the attack probably assumed that Al-Asad had some sanity. They were, unfortunately, wrong.
 * Al-Asad was never in the city when the nuke went off. That's the whole point of the Safehouse mission. He is, according to the informant Nikolai, a coward.
 * Also, in Modern Warfare 2, much of the action is driven by the Ultranationalists, under the command of Big Bad Vladimir Makarov. According to dialogue, Imran Zakhaev kept Makarov 'in check'. Nice job, Soap.
 * Not to mention how the entirety of Task Force 141, the Ranger (Pvt. James Ramirez and his squad) you play as, and pretty much the entire American military are being manipulated by one, who's planning to use the conflict to turn into heroes and obtain the biggest military force in history.
 * About 3/4ths of the way through BioShock (series), the hero comes upon President Evil antagonist Andrew Ryan, whose death you've been seeking for the entirety of the game. The hero is all set to kill him, but that's only right before Ryan gives him a horrifying Hannibal Lecture masterfully combined with a "The Reason You Suck" Speech, revealing that the hero Nice job, hero. It gets better:  Better to Die Than Be Killed.
 * To be fair, President Evil pretty much kills himself by forcing the hero to do it via the mind control phrase.
 * It's more than that. President Evil The Thanatos Gambit plot of the Big Bad aside, if the protagonist didn't kill the President Evil, he would not have made it out of Rapture alive.
 * No,  So he locks the door and tells you to go away. Of course, then you go through the vents.
 * Actually, he had to have known some time beforehand. He hints at this through the PA once you get out of Arcadia. Basically, he sums it up as just too much coincidence. 1) A plane explodes at the exact spot where Rapture lays hidden beneath the sea, and you survive it. 2) You are able to use bathyspheres, Vita-Chambers, and other systems keyed to his DNA. 3) Guess who killed Jasmine Jolene and why?
 * In The World Ends With You, you're given a mission early in the game to make a certain pin popular. In the end, that turns out to be . And since you have to complete the missions or face erasure, you had no say in whether or not to do it.
 * It gets worse. . And guess what you just messed up? Thank heavens for the Gainax Ending, huh?
 * More like thank heavens for
 * In the Halo series when one of the Halo weapons is activated, and then deactivated prior to firing, it causes all other Halos in the galaxy to go active and on standby, whereupon a single command from the Ark command center will fire them all, effectively ending all life in the known universe. Whoops, indeed.
 * In Halo 2, as the Arbiter, you are sent to kill a "traitor" who has, in fact, seen that what the prophets seek is, indeed,
 * And then later in the game, capturing Sgt. Johnson and Commander Keyes,
 * To be fair, not deactivating it would have activated the entire Halo network anyway.
 * Master Chief almost has his own Nice Job Breaking It, Hero moment in the first game - helping 343 Guilty Spark retrieve the Index and prep Halo 04 for firing, assuming it would kill the Flood rather than everything else. Luckily, Cortana is on hand to stop the process and clue the Chief in.
 * The novel Cryptum reveals that
 * Terranigma has a few of these - you start off the game by opening Pandora's Box, for crying out loud. This isn't the Nice Job Breaking It, Hero. No, what is is that to fix all that,  Nice Job Breaking It, Hero, even if you did it Because Destiny Says So.
 * In the first System Shock, SHODAN's ethical constraints were removed by the player character. Whoops. It gets better too. In the second game, you find out the fate of the virus-infested grove that the Hacker jettisoned in the first game, where SHODAN was developing an experimental mutagen. Upon crash landing on Tau Ceti V, the mutants evolved into the collective alien hive mind known as The Many, the main antagonists in the second game. Additionally, ejecting the grove also allowed a portion of SHODAN's AI to survive. This version of SHODAN nearly succeeded in using the ship's warp drive to assimilate reality into cyberspace, after the player character spent a great deal of effort helping her gain control of it. Whoops indeed.
 * And in the second game, you help SHODAN against The Many in an Enemy Mine... Only to discover too late that The Many were the gray in the game's Black and Gray Morality, not the black you were led to believe... and with their lesser evil gone, there's no longer anything stopping SHODAN from conquering the universe. Whoops, again.
 * The gardens in the first game aren't really an example of this trope, though (since as dangerous as they were jettisoned randomly off into space, they were much much more dangerous orbiting around earth.) That's less an example of 'nice job breaking it, hero' and more 'nice job not fixing it completely, hero'.
 * Another example that also results in a Nonstandard Game Over is, early in the first game, it's possible to activate the mining laser, which you need to do to blow it up. Except, you know, without getting it ready to blow up in the first place. Well, you've just helped SHODAN raze the Earth of life. Nice job breaking it, Hero.
 * In Shantae, suddenly, a genie, which were supposed to leave the earth, leaving behind only their half-breed kids like you, who looks like the game's villain sans pirate hat and suggests you cut your hair, which is your only means of offense, sends you into a dungeon to get the last MacGuffin, which the villain is hunting to power a tank to make herself ruler of the world, but leaves you to go in alone, despite the fact genies have great power. When you show her what you have received, she puts on the pirate hat and laughs. Suddenly, you see yourself on the ground, MacGuffinless, as she runs away.
 * After you complete the last quest in Kingdom of Loathing, the council informs you that the monster attacks are due to your presence in the kingdom. They just really don't like you. And since you're stuck in a cycle of eternal ascension and reincarnation, the monsters will never go away.
 * On the other hand, the Council's offhanded way of 'researching' the 'problem', and the fact that they weren't in any rush at all for the Naughty Sourceress to be defeated (They pretty much tell you they love being in power) could mean that this was a complete lie to make you reset the continuity and bring them back into power. (See WMG)
 * After the first level of Star Wars Knights of the Old Republic II: The Sith Lords, namely Peragus (an asteroid-based fuel mining facility), the asteroid blows up, and, with it, an important and abundant fuel source is completely destroyed. Although the player had to get the place blown up (or blow the place up yourself, if you want to Kick the Dog) to stop the Sith, the player will be berated by damn near everybody for creating a galactic energy crisis throughout the first half or so of the game.
 * And again, later on, for Light Side players. After the Exile gathers all the Jedi Masters together on Dantooine, (again). Oops.
 * She's not really a Sith. Well, maybe she is. Who the hell knows? But the game doesn't depict the death of the Jedi as a bad thing; the Exile's crew members go on to build a new order that isn't as corrupt as the old one was (until the movie era, but whatever). The dark side version is really a better example; the player kills the Jedi - which arguably is a good thing - but because they fell to the dark side to do it, they've unwittingly caused a chain of events that will lead to the DEATH OF ALL LIFE IN THE UNIVERSE. But of course the Exile is forced to undo the damage, leading to more or less the same conclusion as the light side version: Jedi and Sith dead, with the Exile and company left to rebuild.
 * On a much smaller end of the scale, you can at one point give money to a beggar. If you do so, Kreia berates you for your naivety, and shows you a vision of the poor guy getting mugged. Of course, if you don't give him the money, he goes out and mugs some other poor guy, so there's really no way to not break things.
 * Back on the larger scale, way back when, the Exile destroyed Malachor in order to stop the Mandalorians. But all the deaths there lead to the events of both games, and the death of all the Jedi. That's why Vrook's such a Jerkass. Mostly. To be fair a lot of it was Revan's fault. Exile's just there to blame.
 * Arguably the entire ending is this, since all the player manages to do is preserve a cycle of brutal, wasteful war between two ancient religious orders with childishly simplistic moral codes who are both pawns of the same self-destructive or just-plain dickish cosmic force.
 * Time Hollow for the DS. Expect everything you alter in time to have at least one catastrophic side effect. Best summed up in the second chapter, where you take your friend's bike lock key to keep them from getting hit by a truck later that night.
 * But it's never permanent. Just as the first problem was fixable, the new one that cropped up is as well, until it reaches a point where everything is finally stabilized. That was one of the best things about the game (and the whole concept of the Hollow Pen), that it acknowledged that all actions have consequences and there are very few simple solutions, but no hole is ever too deep. I mean, c'mon, if all you had to do was prevent what started the whole mess in the first place, the game would be over in two minutes!
 * SoulCalibur IV borders on this in Siegfried's ending- destroying the evil weapon which corrupted his soul, he creates a 'utopia'...but it's unclear if he knew this would mean Nice going there, Siegfried.
 * Tales of Vesperia plays with this, actually, in that invoking the trope is entirely optional (thus, yes, Stupidity Is the Only Option Not the Only Option). When the party collects the first Fell Arm in an optional sidequest, they decide to collect the rest (as is Tales tradition) in order to keep the dangerous weapons from falling into the wrong hands.
 * It's also played straight when Estelle.
 * And then there's another variation with
 * In the background for City of Heroes, Back Alley Brawler took his superhuman war on drugs all the way to South America and Afghanistan, using superheroes to raid drug cartels and burn poppy and coca fields directly to stop the flow of drugs into American cities. Unfortunately, the Evil Power Vacuum was filled with a Psycho Serum called Superadyne, and government research into that led indirectly to the Alien Invasion. Oops.
 * In the PlayStation 2 game Vexx, you start off the game being told by an old man called Darby to collect Wraithearts to power the Rift to travel to new worlds. After you collect a certain number of hearts, it's revealed that Your objective remains the same, however.
 * Tales of the Abyss. Granted, Luke didn't know any better, but try telling him that while he was in the midst of his Heroic BSOD.
 * Pretty much everything the party does for the whole game is an example of breaking something and desperately trying to fix it. The death toll they rack up far exceeds that caused by the villains.
 * Only because they stop the villains from committing genocide.
 * Star Wars: The Force Unleashed. First invoked when Starkiller, . Canonically, this is then Inverted Trope when Starkiller
 * Fallout 2. In a random time-travel incident, you go back in time to Vault 13. The only thing you can do is look at the Vault's Water Chip. And break it. Nice job!
 * The spinoff Fallout Tactics Brotherhood of Steel has every enemy faction's leader bemoaning that your aggression is dooming everyone, that you can't possibly stop the Menace from the West. Not that they explain what it is, or refrain from opening fire on you just the same.
 * How about the "Tenpenny Tower" quest of Fallout 3? Some ghouls, victims of Fantastic Racism, are trying to move into a luxurious tower, but the humans living there will have none of it. If you don't feel like slaughtering either party, you can convince the prominent members of the human community to either relent or move somewhere else, thus letting ghoul and human live together in harmony. Come back a few days later, and the ghouls have executed all the humans over a "misunderstanding."
 * It becomes even more ridiculous when if you kill the ghouls afterwards you lose Karma. This Troper had Manly Tears due to being betrayed and obliterated the lot of the stinking zombies. Losing karma especially with the leader that practically gloated over the fact that all the humans had died horribly seems to be a bit much...
 * Actually, if you shoot said leader in the head the instant the ghouls start moving in, you avoid the slaughter of the humans. Still Black and Grey Morality, but it becomes a case of 'murder one guy to spare dozens' instead of 'tolerance leads only to death'.
 * You can also kill the leader of the ghouls and two of his followers (this completes the quest) without incurring a karma hit if you basically taunt them into attacking you first ("Anything you want to say before you meet your maker?"). You basically take an extremely unorthodox path to a best-of-both-worlds ending:
 * The hardest ending to get in Demon's Crest involves Firebrand taking on the usurper king Phalanx before getting all the crests. The resulting abbreviated boss fight (Phalanx doesn't get to transform) satisfies Firebrand's desire for revenge, and he takes off. But then we learn that "With the defeat of Phalanx, the Demon Realm lost all order and fell into anarchy. Many now ask if living under the rule of Phalanx would have been worse than the hell they are now confined to..."
 * To be fair, Firebrand didn't really care one way or the other about anyone else's circumstances, so this is really just the result of an Evil Versus Evil rivalry.
 * Since it's a world full of demons, how is them killing eachother a bad thing?
 * Exmortis 2 has you free the Earth from the reign of the Exmortis horde... And, to rub it in, he says this:

"Magic Emperor: (* slow clap* ) "Very impressive, Alex. You just killed the only remaining means of becoming a dragonmaster. Hahahahaha... you're making this way too easy!"
 * Odin Sphere is the story of five different heroes who completely and royally screw everything up. Cornelius escapes from the Underworld, Gwendolyn brings back her dead love by killing the Queen of the Dead , Mercedes saves her kingdom by destroying the Demon King's most powerful weapon , Oswald kills anyone else who might be able to help, and pretty much everybody fails to keep safe the ring that can control a machine capable of draining the life force from the planet. To add insult to injury, this was apparently foreseen, as there is a prophecy involved that you have to follow during the final boss fight to get.
 * Legacy of Kain is made of this. At the end of Soul Reaver 2, Kain discovers that his "edge of the coin" is precisely what the bad guys had been hoping for. Fortunately for him, they weren't quite as omniscient as they thought.
 * Raziel eventually discovers this for himself,
 * Even getting to.
 * In fact, just about any Time Paradox invoked in the series invokes this trope. This stretches back all the way to the first game, where Kain travels back in time to murder King William the Just before he can become the threatening Nemesis, only to cause vampires to be persecuted and hunted down to extinction when he returns to the present.
 * Deus Ex likes to pull this one on the protagonist. While the quote above is the most glaring, throughout the game you destroy everything the enemy has in the way of assets. Generally, this comes back to bite your ass and chew with gusto. Let's take a look at a few.
 * You retrieve the terrorist's stolen medicines against a deadly plague, and their leader is dead, possibly by your very hand. But wait, they were the good guys, and you just stopped the medicine from getting to a guy who could use it to make more.
 * You blow up the machine the Big Bad uses to make the plague. The same machine you needed to make the cure.
 * You save one ally only to lure him into a trap. Unwitting Pawn, thy name is JC Denton.
 * You retrieve schematics to build your own cure making machine, and the big bad uses you to rebuild his own plague maker. Nice job fixing it, hero.
 * You redirect the bad guy's nuke at himself, and incinerate innocent US soldiers without even inconveniencing the big bad.
 * Well, for one, you didn't have to fight through half the US army just to get to him...
 * In Shadow the Hedgehog, the PC gathers the Chaos Emeralds... which the Big Bad uses to start stealing the earth's energy. Oops.
 * Hell, Shadow's entire backstory is one big Nice Job Breaking It, Hero. Professor Gerald attempts to create the Ultimate Life Form by allying himself with the Big Bad of Shadow the Hedgehog to cure Maria, then decides to double cross him by building the Eclipse Cannon. Unfortunately, the UN realized that what Gerald was doing was wrong and sought to stop him. The end result saw Maria killed by GUN soldiers, leading Shadow and Gerald to proclaim vengeance on the world. How do they do that? Gerald rigs the Eclipse Cannon (and thus the Space Station ARK) to initiate a Colony Drop once the weapon is armed with all seven Chaos Emeralds. And who's the wonderful person who does this? Why, Gerald's own grandson, Dr. Eggman, of course!
 * In Dragon Fable,.
 * Gears of War 2: A certain piece of collectible literature reveals that the Lightmass Bomb that was intended to destroy the Locust stronghold only served to destroy the Kryll's breeding grounds, and had the side effect of awakening the dormant Riftworm which the locust used to literally undermine the last remaining safe city on the planet.
 * In Act 3, Niles' AI advises Marcus and Dom not to mess with the main computer. They do, which wakes up the Sires, causing you to have to flamethrower CHANESORR your way out of the place.
 * Fate Stay Night, Heaven's Feel route, has a villain whose big plan to become immortal involves bestowing incredible power on a certain girl, then using her as a sacrifice. So let's give her that power in the most brutal, abusive way possible, and while we're at it, have her raped on a regular basis! What could go wro-- * crunch*. Nice job Breaking The Cutie,.
 * On a related note, nice job giving a Hope Spot and then finally tipping her into total craziness by selective obliviousness,.
 * In Bomberman 64, the white bomber travels to the 4 anchors of the Big Bad's floating fortress to destroy its barrier, allowing our hero to confront Altair and prevent him from draining the planet's life force using the Omni Cube. However after stopping Altair, And as an added bonus
 * Used again in Bomberman Hero. Bomberman keeps the last remaining Data Disk safe from the Garaden Empire, collects the other three that they already have, and then returns them all to Princess Millian...who turns out to be Natia in disguise, allowing them to revive Bagular.
 * Bomberman 64: The Second Attack has two similar cases of this. After confronting the Big Bad who is possessed by a demon, the demon will take advantage of the fact that Bomberman has gathered the elemental stones needed for his full resurrection and siphon the energy from them to regain his earthly form. Depending on certain choices you made previously, the goddess Mihaele may appear after this battle and attempt to use the stones to seal the demon away for good. However, the demon counts on her to try this and ends up sealing her away and absorbing the stones' full power to become an unstoppable god of chaos and destruction.
 * Lunar: The Silver Star: Alex needs to get the fourth piece of the legendary Dragon Armor to challenge the Magic Emperor, but the zombified Black Dragon is in his way. He and his allies kill it, but, as the Emperor notes after the battle, Blue and Red were already dead by the time he got the Dragon Shield and Helmet, and personally killed Quark, the White Dragon. With Black dead, there are no Dragon Tribesmen left to protect the goddess Althena, allowing him to turn her into a Person of Mass Destruction.
 * Lunar: The Silver Star: Alex needs to get the fourth piece of the legendary Dragon Armor to challenge the Magic Emperor, but the zombified Black Dragon is in his way. He and his allies kill it, but, as the Emperor notes after the battle, Blue and Red were already dead by the time he got the Dragon Shield and Helmet, and personally killed Quark, the White Dragon. With Black dead, there are no Dragon Tribesmen left to protect the goddess Althena, allowing him to turn her into a Person of Mass Destruction.

It of course turns out the Magic Emperor was only half right, because there was one dragon left in the form of Alex's talking cat Nall."

"Neck, back of the head, from the right eye to the lips, Upper right arm, lower right arm, right ring finger, left elbow, left thumb, Middle finger, left breast, from the rib bones to the heart, two places of the stomach to the abdomen, Left crotch, left leg thigh, left leg shin, all of left foot toes. As I went past her. Without even taking a second. Literally at a blink of an eye. I "dissected" her into 17 pieces of meat."
 * Shadow of the Colossus. So yeah, it kind of turns out.
 * Oh no, that's not how it went down. You knew this place was forbidden, you knew you were making a deal with the devil, you knew you were being told to kill 16 defenseless and majestic creatures to release a demon. You knew it all, and you kept playing, kept doing this evil.....because videogames had trained you to do it. You evil bastard.
 * In Okami, Amaterasu and Issun go off to stop the raging Water Dragon Whoops. It's quite the severe case of Nice Job Breaking It, Hero.
 * Though everything's turns out fine, in the end.
 * Jak and Daxter. Having bested, Jak moves a huge warp gate back to Sandover Village. When opened, it releases a Horde of Alien Locusts, ... And this happened in the first two minutes of Jak II Renegade..
 * . Yeah, Jak does this sort of thing a lot.
 * The Age of Mythology Titans expansion is about Kastor being tricked into destroying all the safeguards the gods had put in place to keep Kronos in Tartarus. Of course, while the player knows this, Kastor doesn't, making going along with the mission objectives the only option.
 * In Dragons Lair 2, Dirk the Daring is responsible for quite likely the single biggest Nice Job Breaking It, Hero in HISTORY... or at least the first: He gives Eve the apple, while trying to fend off her advances, an annoying cherub, and two hungry snakes.
 * The goal of Fruit Mystery is to feed the animals at the zoo. The zookeeper doesn't approve.
 * Sora's mission in Kingdom Hearts is pretty simple: Reunite with his friends Riku and Kairi, stop the Big Bad, and smash up any Heartless that may be standing between him and these goals. Except later in the game, the Big Bad Ansem and uses it for the rest of the game. Which means when Sora defeats the Big Bad, well, he pretty much  at the same time. Whoops. In the sequel,  but Sora encounters another problem. All the Heartless he'd been smashing up in the first game?  Also, those two Big Bads were . Yeah. Nice Job Breaking It, Hero.
 * To be fair, though, the situation in the second game was also a Sadistic Choice. Sora's options were essentially a) let the Heartless consume the worlds and everyone in them or b) kill them and.
 * In the second game, Sora is tricked into removing the lock that Zeus placed on the Underdrome. Hades is pleased.
 * In Birth By Sleep, it's Yeah. Really nice job breaking it hero.
 * Turns out she
 * The other two weren't much better.
 * In RuneScape, the quest 'Spirit of Summer' ends with the spirits telling you that Summer's great plan to defeat the Big Bad turned into a Xanatos Gambit for the other side: instead of hurting the Spirit Beast, you just made it stronger, starting the sequel, 'Summer's End'.
 * And in the quest 'Enakhra's Lament', you get enlisted to build a statue and end up solving the puzzle in a temple, ending with you liberating an entrapped spirit and attempting to capture his nemesis, who breaks out and they both flee. Then the guide throughout, Lazim, is furious at you because he wanted to learn from the Mahjarrat spirits, but you freed them, effectively ruining his chances.
 * This troper considers wanting to learn from two Mahjarrat makes Lazim Too Dumb to Live- wanting to learn is fine, but actually believing that they wouldn't kill him in a second was stupid.
 * RuneScape is fond of this trope. In another quest, 'Priest in Peril', the bad guys take advantage of your Plot Induced Stupidity to get you to kill a Guard Dog that was preventing them from polluting the Paterdomus temple and the Salve River. Said temple and river are the only things that's keeping the evil in Morytania from invading.
 * Plot Induced Stupidity is used A LOT. It's bloody obvious that the Fairy Godfather is the bad guy if you're at all Genre Savvy, but you have to screw up so there's a proper sequel.
 * Another one: the quest 'Shadow of the Storm', where you are told to help summon the demon Agrith-Naar so you can kill it for good (being in its own dimension gave it more power), only to find out that the demon was already in the world, and trapped in a much weaker human form, and you actually sent it back to its own dimension and freed it of being trapped in human form. Nice Job Breaking it, Player.
 * And see, in the end of Summer's End, you've destroyed the Spirit Beast... and now it's in the physical realm and even MORE dangerous. Oh Crap.
 * Although it can't get any stronger and can be killed in the physical realm. It's still the most powerful known thing in the world, but it isn't invincible.
 * During the quest Temple of Ikov, you a given the choice to follow this trope. A frail hooded man named Lucien will ask you to retrieve an artifact know as the Staff of Armadyl. After running through a few trials, and finally reaching it, you are now forced to kill several guardians of the staff (who are dressed in a way that almost obviously makes them good guys), and then, upon gaining the staff and bringing it to Lucien, he thanks you by taking it and then laughing maniacally. It's probably worth noting that this is the same staff that Lucien will later use to kill a lot of your friends and mentors. Nice Job Delivering it, Player.
 * Happens at least twice in Neverwinter Nights 2, both times being of the Stupidity Is the Only Option variety. After you've defeated the leader of the Githyanki who have been trying to kill you since the beginning of the game, she reveals that the silver shards she was willing to kill you for were needed in order to destroy the Sealed Evil in a Can...and now the world is doomed. The same thing happens after you've defeated If only these people would, say, share their motivations instead of just trying to kill you all the time.
 * For most of Silent Hill 1, Harry runs around the town finding and neutralising the Marks of Samael that Dahlia claims are causing "the darkness" to encroach upon the town. Of course, they're actually Seals of Metatron, placed by Alessa to prevent the power behind the darkness from increasing in strength, not only causing the two worlds to collide in an even more nightmarish monument to Chaos Architecture, but weakening Alessa enough for Dahlia to capture her and use her in the ritual to birth "God", resulting in the death of Harry's daughter and the permanent transformation of Silent Hill into a Malevolent Architecture Genius Loci. Thanks a lot, Harry.
 * Nice job throwing that Aglaophotis, Kaufmann.
 * Nice job destroying in a way that makes you swallow his  persona,  Made you a totally crazed Yandere with emotional restraint issues. Plus essentially turned Shiki into a breathing corpse because, And turned yourself into a bloodsucking monster . And... well, we'll just stop there, hm?
 * Even earlier:
 * Even earlier:


 * In Crackdown, you, the Agent, end up being a massive Unwitting Pawn who . Although since you can play the game as a Sociopathic Hero who mows down pedestrians without much trouble, you just might not care.
 * In the sequel, Pacific City is plagued by mutated monsters that even the Agents have a hard time dealing with. Why? Because when the Agent whacked a Shai Gen Mad Scientist, he inadvertently released the mutants in said scientist's lab.
 * Happens twice in Killzone 2.
 * Killzone 3 as well.
 * Paladin's Quest for the SNES begins with a particularly huge example. On a dare, the Player Character, a thirteen year old student Spiritualist (the setting's term for a magic user), sneaks into the abandoned and spooky tower on the school campus. When he reaches the top, he pushes a big shiny button. This awakens Dal Gren, a biomechanical terror from ancient times that nearly destroyed the world about 10,000 years ago. Said monstrosity immediately knocks the poor sap unconscious, lays waste to the magic academy, kills everybody else there in the process, and flies off to destroy the rest of the world. Um, oops?
 * This happens in The 7th Saga after you manage to recover all of the Runes.
 * Though it should probably be pointed out that only one of the possible characters is actively trying to be a hero, the others are in it for personal gain. Hell, one of them is a demon who wants the power to rule supreme.
 * The three factions of Supreme Commander spend the whole game fighting over control of Black Sun for their own purposes, no matter who seizes control of it in the end, firing it opens a rift between this world and the quantum realm, allowing the Seraphim to start a rampage of human extermination across the galaxy continuing on the expansion.
 * In Bleach: Shattered Blade, the main plot takes place as a result of the destruction of the Sokyoku, which . In the story mode, the main character gathers the pieces, which results in.
 * In The Conduit, Mr. Ford spends the first half of the single-player campaign trying to stop, but ends up.
 * Sort of an example, although it still helps your cause: beating the Milkman Conspiracy level in Psychonauts restores the milkman's previous, sealed-away identity...
 * Prior to the events of Shoot'Em Up Battle Garegga, the Wayne brothers are given a contract to develop new advanced vehicles and weapons for their government. One year later, the government tries to Take Over the World. The brothers then set off in two Super Prototypes and spend the entire game fighting the war machine they helped create.
 * Guybrush Threepwood of the Monkey Island series has a nasty habit of invoking this trope, from willingly surrendering a piece of the Ghost Pirate LeChuck's body to Largo LaGrande so that he can resurrect him in Monkey Island 2 Le Chucks Revenge, and proposing to Elaine Marley with a voodoo-cursed ring that freezes her into a golden statue in The Curse of Monkey Island, to screwing up a voodoo spell and spreading LeChuck's evil voodoo pox all over the Caribbean in Tales of Monkey Island.
 * Speaking of Tales, this spreading of the Pox of LeChuck is followed by
 * This has been the premise for the other classic LucasArts game, Maniac Mansion: Day of the Tentacle. Though there was a request for a rescue from Green Tentacle, Bernard also frees Purple Tentacle, who gained a thirst for power, which is why their creator Dr. Fred tied them both up in the first place. Purple Tentacle runs off to resume his conquest leaving Bernard bearing the realization of his mistake.
 * In Quest for Glory, this happens at least once each in Trial by Fire, Wages of War and Shadows of Darkness. In these cases, the Stupidity Is the Only Option trope is averted as the Hero is either being magically forced to help villains, or could not possibly be expected to foresee the results of his actions.
 * In Trial by Fire, you are mind-controlled into helping the Big Bad find and retrieve the artifact he plans to use to conquer the world. Failure to fix this will in some cases lead to a 'Game Over' message concerning the look of surprise on Big Bad's face when he realizes he bit off more than he can chew.
 * In Wages of War, the peace conference you spent the entire game arranging goes catastrophically sour and has the exact opposite of the intended effect.
 * In Shadows of Darkness our hero is once again dominated into helping the villain, this time through the use of a geas, a magical means of forcing certain behavior. By the time the terms of the geas are complete, the Hero must initiate the Apocalypse in order to avert it.
 * Shadows of Darkness has a more minor one as well; the innkeeper's daughter is missing and assumed dead, and (being a hero) you have to rescue her. Unfortunately, the child is currently a vampire in the service of "Aunt Trina," the above-mentioned villain, and they actually like each other; resurrecting Tanya and bringing her back to her parents is what pushes Trina's Berserk Button and ultimately leads to her geasing you. Oops.
 * Regardless of your actions in Shin Megami Tensei: if..., you always eventually discover that the Demon Emperor . However, your choice of partner influences which themed worlds you enter during your quest; if you enter the Wrath world,
 * Ace Combat X Skies of Deception offers you a few opportunities to "break it". You can ignore the Miller Unit poised to take over Port Patterson, forcing you to have to backtrack to save it. You can ignore the Hamlet Unit and whatever they're planning, forcing another backtrack when they take over Santa Elva and the dealing with That One Level. You can let Leasath transport planes get to Griswall by going after jammers first, allowing the enemy superweapon to get a nasty upgrade. At the final crosspath the game forces a Sadistic Choice on you that will strengthen the Fenrirs in the final missions one way or the other.
 * Wario Land 3 has Wario collecting various pieces of treasure for the entire game, to help a hidden figure in an ancient temple (and presumably, escape the pocket universe in which he's trapped). However, after you collect all the pieces of treasure, a music box song plays... then it turns out that the hidden figure who's been manipulating Wario is Rudy the Clown, the game's Big Bad. Cue final boss battle.
 * Wario World has the entire plot started by this. It's Wario's plundering of a black diamond deep in the jungle that unleashes the ultimate evil... the Eldritch Abomination / Artifact of Doom that's the Black Jewel itself, which proceeds to turn his entire castle into a parallel universe filled with monsters.
 * In Marvel Ultimate Alliance 2, Tony Stark's What the Hell, Hero? plan to use nanite controlled villains forms Voltron with Captain America (comics)'s Nice Job Breaking It, Hero, when the latter frees them all from their pens to create a distraction in a fight.
 * In Mercenaries 2, the player character is originally hired by Ramon Solano to break a friend of his, General Carmona, out of captivity; so Carmona can launch a coup and install Solano as the new President of Venezuela. The merc successfully does this, which causes immense suffering, sparks a war between the United States and China, and Solano screws the merc out of their paycheck. Guess which reason the merc decides to take out Solano for. Hint; it's the paycheck.
 * In Pokémon Mystery Dungeon: Explorers of Time/Darkness/Sky, you and your partner Pokémon, along with the rest of Wigglytuff's Guild, help to track down, the thief who was stealing the Time Gears, the removal of which was stopping time in areas around the world and causing Pokémon to go berserk. After he is caught, you and your partner are , the Pokémon who had practically become a mentor to the two of you. As it turns out,
 * This shows up a few times in Dragon Age: Origins. One notable example is the "Summoning Sciences" sidequest. One of the spirits you summon during the quest is "The Trickster". Later the Chantry Quest Board has a quest called "Unintended Consequences", which requests that someone stop whatever is killing people on a certain trade route. When you accept the quest and investigate, it turns out that the Trickster you summoned is the one killing people. Oops. Somehow it doesn't feel right accepting a reward for cleaning up a mess you started.
 * Due to the Grey and Grey Morality and tricky politics in Orzammar it's all too easy to make things worse in the long run. . Also, may seem like the right thing to do at the time. In the epilogue.
 * In Planescape: Torment, in order to learn the whereabouts of your mortality, you must free the angel Trias from his imprisonment beneath Curst, a town populated entirely by liars and betrayers. Sounds good, right? After all, freeing an angel is a good deed, right?
 * In Devil Survivor, you have a choice of five ends, four of which directly aim to solve the problem of the oncoming war between demons and angels (or be a part of it). Then there's the fifth option: choosing to support your increasingly panicky Staff Chick Yuzu and the Action Survivor Determinator Honda to desperately escape the Special Defense Force blockade and evade judgment. Hooray, you've managed to kill innocent civilians, shirk your duties and live another day! ...right? To clarify,  and He's not okay with this. Believe it or not, being The Chosen One means something.
 * Even the Gigolo chews you out for taking this route, and he was only involved for the lulz.
 * Super Smash Bros.: In all three installments of the series, though mostly the original and Melee, the single-player mode ends with the player character killing their creator and the entire Smash Bros. world being destroyed.
 * Also, in Melee, the player turns Bowser into a trophy, unleashing Giga Bowser as the final boss of Adventure Mode.
 * In God of War,
 * To be fair, the gods are the ones who gave you this mission and told you to seek Pandora's Box in the first place. It's a happy coincidence that the guy they want you to kill is someone you already hate.
 * At the end of Toejam and Earl, the guys are received as heroes for surviving a visit to the most dangerous planet in the known universe: Earth. That is, until it's discovered that a large number of Earthlings followed them back and are trashing the planet. Toejam and Earl set out to solve the problem themselves presumably to avoid being punished for it.
 * In the first Baldurs Gate, a sidequest has you escort a poisoned man to a nearby temple for treatment. Later on, a Flaming Fist mercenary (essentially the police force of the game) reveals that the man you helped actually betrayed the Fist and stole several magical items and gems. Nice job helping a criminal walk free, hero.
 * In Splinter Cell Conviction (not too sure about earlier games) destroying a light, if noticed by enemies, will result in them using their flashlights. Subverted as, depending on the situation, it may be a worthwhile tradeoff.
 * Conviction also has a stereotypical Gonk Hollywood Nerd and Sam Fisher fanboy who gives him his goggles, which are needed to bypass all the security tripwires he designed the algorithms for. Nice job being a huge Metal Gear/Resident Evil fan, Poindexter.
 * In Wild ARMs 2, it's not the hero who breaks it, it's the Magnificent Heroic Bastard. spends the entire game orchestrating the plot to save the world, making many "necessary sacrifices" along the way, up to and including  While this succeeds spectacularly, it has the unfortunate side effect of tearing the heroes apart emotionally. And the main character happens to have a demon sealed inside of him that feeds off of negative emotions.
 * In the obscure Xbox action rpg Dungeons & Dragons Heroes, you spend the bulk of the game unlocking and traveling through several rift portals in order to combat the Big Bad's minions in various worlds. Whoops.
 * The entire premise of Epic Mickey.
 * In the old NES game The Adventures of Rad Gravity, you spend the entire game trying to defeat the wizard Agathos, who is trying to prevent you from linking up the benevolent supercomputer network. Then when you finally beat him, you learn that he was a good guy, that linking up the supercomputer network will be catastrophic to the galaxy, and that the evil mastermind has been your ship's helpful onboard computer, Kakos, the whole time.
 * Averted in Mass Effect 2 with Legion. What, now? You sold it off to Cerberus? Congratulations, now no one will stop the Reaper Virus from overtaking the normal Geth, turning them all into Reaper minions. The bad Geth are now 20 times stronger. Nice Job Breaking It, Hero.
 * Just how does Shepard rescue Liara from the security system she gets trapped in? Use a mining laser to destroy the entire dig site, being saved from sinking into lava by the slimmest of margins.
 * Taking down Saren and Sovereign at the end of ME1? Good work, Shepard—now the Reapers are interested specifically in your species. Cue the Collectors raiding human colonies... and then, the events of ME3...
 * Shepherd really had no other choice. He was the only one who could stop Saren. The entire mess with the Reaper abductions was unavoidable. Damned if you do, damned if you don't.
 * This might go without justification as Shepard deliberately releases all prisoners of a maximum security space station just to recruit a peculiar squad member. Mind you, every single of the prisoners were mentally unstable bloodthirsty psychopaths of which the most innocent just killed 20 people and destroyed a mere habitat. After the prison riot, the station tore apart killing everyone inside, guards included.
 * On the positive side, the destruction of the prison made sure to send about 4,350 serial killers straight to Hell. On the negative side planetary governments have no place where to send their most notorious criminals anymore and have to keep them where they have a chance to escape and resume their killings.
 * However, to counteract that, the whole setup was just another pirating gig, and those prisoners were liable to be released to whoever wanted to pay for muscle. Or when the Suns needed cash. Or some muscle themselves. Or when their home planet stopped paying exorbitant bribes. So, maybe governments will have to put their convicts in prisons not run by corrupt mercenaries?
 * Let's not forget the letter Shepard receives after said mission, saying a convict named Billy escaped and plans to carve Shepard's name into his victims.
 * In the Arrival DLC, you
 * Mass Effect 3 can lead to several Paragon decisions turning around and biting you in the ass. For instance, telling to stay on the Citadel and help Cerberus victims  Sparing  seems like a great idea, too, until
 * Heroes of Might and Magic IV reveals in its introduction that all the effort the heroes put into Heroes II, Might & Magic VI, Heroes III, Might & Magic VII and Might & Magic VIII was a complete waste of time because Gelu decided to wield Armageddon's Blade in single combat against a barbarian carrying the Sword of Frost. Turns out that the clash of those blades causes the complete and total destruction of the entire planet! Well, nice job causing an Earthshattering Kaboom, Gelu. Dunce.
 * To be fair, the effort wasn't completely wasted—Enroth still got a decade under a good king, the Kreegan were repeatedly delayed from destroying the world themselves, and who knows if the world-ending that a failed effort in Might & Magic VIII would have resulted in would have spawned the portals to other worlds that saved a decent fraction of the planet's population.
 * It turns out that by running from the zombie outbreak and preserving their own lives, the survivors of Left 4 Dead and Left 4 Dead 2 have been aiding the spread of the infection. Oops.
 * Heavy Rain has
 * Dantes Inferno: Dante must break large links of chain in order to progress through the Inferno. Satan later reveals, "My salvation for breaking the chains of Judecca."
 * Poor Spyro the Dragon from the reboot trilogy just wanted to save the girl he loved from getting turned evil and the Ultimate Evil from being unleashed. Then, after killing that games Big Bad, he freezes them in time to protect them from a collapsing mountain.  Though in Spyro and Cynder's defense, Malefor may have just lied to screw with their heads.
 * Nie R has a pretty big one.
 * It's actually even worse than this.
 * In Illusion of Gaia, there's the subquest of collecting 50 red jewels, littered all over the world, to get the jeweler's "secret". Turns out the secret is, that Oops...
 * Thankfully, there is little consequence either way. It's just a Bonus Boss: a pretty tough one given that you don't have the same set of moves the other game's hero had.
 * Kite just wants to save his friend and everyone else who's being put into comas by Phases. Destroying Phases actually results in The World (where the comatose people's minds are currently located) becoming more and more unstable, followed by the entire Internet nearly getting wiped out.
 * Haseo wants to save Shino from her coma caused by AIDA. Eliminating AIDA doesn't bring her back from her coma and creates Cubia, which will wipe out the entire Internet via sheer size.
 * The protagonist Lazarus Jones from Ghost Hunter basically couldn't keep his hands to himself and pressed a switch which freed all the captured ghosts in the ghost array (kinda like the original Ghostbusters). Then poor Jones had to take up the job of re-capturing them.
 * The Zork series is full of these but the best example is in Zork Zero, where you have to fill in some bottomless pits to get past a specific area. Oops, you let out the infamous evil creatures of darkness... grues. Thanks.
 * Ecco the Dolphin managed to save his pod in the first game... but accidentally broke the timestream in the process. Good job, dolphin, now go fix it before the aliens take over.
 * In the very beginning of Singularity, the protagonist is dragged back in time and saves a Soviet scientist from a burning building. Not only does this advance a dangerous project far beyond where it would have gone, but.
 * Even his attempt to fix what he'd broken breaks the world. If the player chooses the good ending and
 * Rather, "Nice Job Breaking it, God" in Jericho. His first creation, before Adam and Eve, was a terrifying nightmare that was neither dark nor light, male nor female; embodying everything and nothing. So he decides he doesn't like it and throws it in the Abyss like an unwanted puppy. Naturally it is unhappy with this and spends all of its existence trying to escape and wreak havoc.
 * In Strife you are given a choice of missions early on by the corrupt governor. One is to investigate and destroy a tap connected to the local power main. What you aren't told is that
 * Dead Space 2: In his attempts to survive the second necromorph outbreak Isaac makes quite a mess..
 * Near the end of Dragon Age II you gather components the components that Anders claims he needs to finally separate him and Justice/Vengeance.
 * Hawke and company also broke it earlier when they And in the end, no matter which side Hawke takes, his/her actions
 * It is only this trope if you don't agree with Anders. If you do, however, this is just a rather extreme way to start a much-needed revolution.
 * RPG Shooter Starwish has a particularly large-scale one in its backstory.
 * A variant is attempted about two-thirds of the way through the game. It succeeds, but only afterward does the instigator realize this has released the Big Bad . She is not happy about this.
 * And then there's the main character's Be Careful What You Wish For, which is both smaller and larger.
 * In Dungeons & Dragons Daggerdale, defeating the Big Bad Rezlus.
 * Albion. While looking for a guide to lead you to the passage that takes you to the Toronto, you have the option to break out a dangerous serial killer with a ridiculously bogus excuse for why she was locked up, from prison. The first thing you find when returning to the city is a crying little girl who's mother was killed by an evil lady. There's a reason walkthroughs will ignore the prison.
 * Mizuhara steals Toko's medicine in Kara no Shoujo because she believes it's an illegal drug and a present from Reiji, of whom she is jealous. On the plus note, she doesn't have to see the full consequences of her actions since
 * The first half of Ratchet and Clank Going Commando is spent chasing down a thief who stole an experiment from Mega Corp. Then, after that mission's accomplished, they then learn that Oops, indeed.
 * In The Orion Conspiracy, Devlin is forced to do this. He is being chased by, and he sets a trap in the engine. He lures   onto an exposed power cable, only to find out that   is too tough to be killed outright by electrocution, and that it was only stunned. So he ends up opening up fuel containers, making a Lampshade Hanging on how unsafe this is, spills liquid gas onto  , and runs off, while   ends up on fire and explodes. Unfortunately, Devlin finds out shortly afterwards that by doing this, he wrecked up the engines of the space station, and that the station is now in danger of falling into the black hole nearby. Now he has to fix this! Nice Job Breaking It, Hero, indeed!
 * In The 3rd Birthday ending, it was revealed that
 * In Tomb Raider: The Last Revelation, it is Lara Croft herself who unwittingly releases the Egyptian god Set from his sarcophagus. Needless to say, he's not happy and bent on bringing about the apocalypse.
 * Arc the Lad has one even earlier, in the first game. The token female character puts out a three thousand year old flame that has been burning on a sacred mountain in order to escape an arranged marriage. We find out that this flame had been
 * The Reconstruction. Dehl leaves behind at the end of chapter 5, who then proceeds to  Dehl also allowed
 * Also, accidentally makes the final boss go One-Winged Angel.
 * Dehl broke it before the game even started;
 * And Father Sikohlon broke it even before that by.
 * L.A. Noire has one in Wham! Episode, "Manifest Destiny". . This is bad news because.
 * Even more dramatically..
 * In the 2007 Conan the Barbarian game, the title character broke the seal statue that imprisons the Big Bad Graven at the beginning of the game and the hero has to stop him throughout the whole game.
 * Red from Solatorobo tries to stop a gang of sky pirates stealing a warehouse in a sidequest (not the cargo of a warehouse but literally the entire building), but he completely forgets that destroying the air ship using explosives would be counter productive.
 * You release a girl from a dungeon in Fantasy Quest, thinking her the princess you're seeking. You quickly learn that you're wrong, but later info reveals that she's actually a mass murderer. She was in PRISON after all...
 * In Fable, specifically in the lost chapters version, at the end of the game the player must collect several souls in order to open the way to the final boss who's true form is revealed to be a huge dragon, which you must defeat. Sounds like a good idea right? However, killing the final boss is in fact completely unnecessary, as even  states that he would remain sealed up and never able to escape if the player had never opened up the path to him in the first place.
 * Given that unless he is killed he will still be free to screw the world up through his mask, even if you didn't free him, he would still be out there causing suffering to everyone.
 * In Dragon Ball Z Budokai Tenkaichi 2 you can toss around huge explosive effects that, in the series the game is based off of, are capable of destroying the planet. Consequently, if you hit your opponent with one while they are standing on the ground (or if you miss them entirely) you are treated to a lovely cut scene of the Earth (or Namek, if that's where you are fighting) getting hit by your planet-killer attack and the rest of the battle is fought on the surface of your dying world complete with fire and earthquakes. Nice job breaking it. Although, as this is an on-the-rails fighting game, the planet will be back to normal in the next stage.
 * In Titanic: Adventure Out of Time, if you complete all the three objectives, you prevent the World War I and the rise of Nazism and Communism. If you complete just one or two, you make the world much worse, with either Nazis or Communists taking over Europe.
 * In Adventure Quest, your character unknowingly sets the tyrant King Awethur free from his imprisonment in one quest. One of the NPCs even says "Nice job fixing it, hero."
 * In The Last Stand Union City, the Game ends with you
 * After Mario defeats Count Bleck in Super Paper Mario, it's revealed that Dimentio was using everyone as Unwitting Pawns in his own grab for the Chaos Heart, which is in the process of destroying the multiverse. After taking advantage of the Count's defeat to take it for himself, he manages to speed up the process, destroying all dimensions in the process. Oops.
 * In Adventure Quest, your character unknowingly sets the tyrant King Awethur free from his imprisonment in one quest. One of the NPCs even says "Nice job fixing it, hero."
 * In The Last Stand Union City, the Game ends with you
 * After Mario defeats Count Bleck in Super Paper Mario, it's revealed that Dimentio was using everyone as Unwitting Pawns in his own grab for the Chaos Heart, which is in the process of destroying the multiverse. After taking advantage of the Count's defeat to take it for himself, he manages to speed up the process, destroying all dimensions in the process. Oops.