Canon Discontinuity



"Stradleyism: The act of dismissing an element of Canon altogether on grounds of it being "stupid", without taking the effort to do something interesting with it."

- Thefourdotelipsis, Wookieepedia, on Dark Horse Comics writer Randy Stradley

As the Fanon Discontinuity trope shows, there are certain elements in Canon works that fans don't want to remember, because they're viewed as stupid, unpopular, or just plain don't make sense within that universe. If their complaints are loud enough, and if the writers agree, this can lead to the offending element being written out of Canon altogether.

One of the meta-causes of Alternate Universe.

Sometimes the discontinuity is more subtle, such as a single line of dialogue or the specifics of an event. Besides those things, everything else is in Canon. When that happens they are treating it in Broad Strokes. Note that this trope has to do with the creators putting something out of continuity. For when fans do it, see Fanon Discontinuity.

See also Continuity Reboot, Alternative Continuity, Broad Strokes, Disowned Adaptation. Old Shame works usually get this treatment. The opposite of Ret Canon and its descendant tropes. See Cutting Off the Branches for when all but one ending of a game with Multiple Endings become Discontinuity.

If the writers lampshade a Discontinuity, either canonical or just something the fans want to be discontinued, then that's Discontinuity Nod.

Anime and Manga

 * The last hundred or so pages of Battle Angel Alita are ignored by the renewed Battle Angel Alita: Last Order; originally intended as an adaptation of the last level of the game of the comic, it has spiraled into a second story longer than the original that is still ongoing. It should be noted that in this case, the original ending was an effort to avoid Author Existence Failure. After he got better instead, he decided to do it right.
 * Nadia: The Secret of Blue Water's director Hideaki Anno created a compilation of the series called "The Nautilus Story", which deletes much of the island/Africa continuity (episodes 23-34).
 * Dragon Ball Online ignores Dragon Ball GT and even certain elements (read: Filler) in the rest of the Dragon Ball anime. This is likely a result of Akira Toriyama having creative contribution to the series, as well as the fact that it's based on the original manga.
 * Dragon Ball Online itself suffers from this trope to some extent, including the Unfortunate Implications that Goku and Vegeta must have Really Got Around for so many humans being able to access Super Saiyan
 * OR... considering one becomes a Super Saiya-jin by making a wish on the Dragon Balls, they didn't have to.
 * The animated version of Tsubasa Reservoir Chronicle contains a discontinuity with the "Tokyo Revelations" OAVs ignoring the last filler arc from the broadcast series and picking up right after the escape from the Rekort library.
 * Macross II has been officially been shunted off into its own private universe. Aspects of the original Macross TV series and the movie Do You Remember Love are taken in Broad Strokes in later Macross series.
 * A good portion of this stems from the fact that Macross II was not a Studio Nue production—Bandai wanted something for a tenth-anniversary celebration in 1992, and when it seemed that Shoji Kawamori's cooperation was not forthcoming, came up with the story themselves. Of the original production staff, only Haruhiko Mikimoto actually worked on Macross II.
 * Nothing from the Sun Wukong arc of Shamo has been mentioned once in subsequent chapters. The arc that followed it was a flashback arc that followed a different character, and when the series finally came back to protagonist Ryo Narushima he had become a washed-up prize fighter, as opposed to the near demi-god he was at the end of the Sun Wukong arc.
 * The second Digimon Tamers movie is mostly about a Digimon attacking on Ruki's birthday and mind-controlling her with a song she used to sing with her father. It also seemed to latch on to the idea planted in the final episode that the Tamers could use the portal Takato found in Guilmon's house to reunite with their partners. It was written and produced without the input of the head writers, however, and a CD drama released later reveals that the kids had yet to reunite with their partners even a year later, and revolved around them sending messages to the Digital World that their partners might stumble upon one day. (One of the writers speaks highly of the movie on his website, however, and the drama has a scene of Ruki humming the song from the movie.)
 * While the writers of the Naruto Anime largely restricted themselves to creating new villages and countries for Filler arcs, leaving the major names alone for future Manga expansion, one blaring example of this emerged: Mission - Protect the Waterfall Village OVA. As portrayed in the OVA, Waterfall Village is so small that a dozen men can effectively seize control of the entire village and their leader is a spineless teenager. Yet a later anime arc implied the village was highly aggressive and prone to launching border attacks on larger countries. And if that wasn't enough, Word of God is that the village had the third-most powerful bijuu under their control.
 * The Gundam franchise has Gaia Gear, a novel written by franchise creator Yoshiyuki Tomino, set 110 years after Chars Counterattack and focusing on a literal Char Clone. The later Mobile Suit Gundam F91 and Victory Gundam, also written by Tomino, push Gaia Gear into discontinuity by contradicting elements of its backstory. As far as Sunrise is concerned, any Gundam work not animated doesn't count, no matter how well it cleaves to canon - even so, that hasn't stopped them from animating the popular Gundam Unicorn novels, retroactively making them canon, despite being set before series that predate it by as much as 16 years.
 * Not only was Episode 4 of Tengen Toppa Gurren Lagann cut out of the manga, but the Episode 5 Opening Narration even refrained from using clips from that episode!

Comic Books
"I hope that Marvel readers will be proud to call Trouble the origin of Spider-Man."
 * Lampshaded in the Grant Morrison run on Animal Man - Animal Man meets the previous version of himself from another continuity during a peyote trip. The same storyline has him meet Grant Morrison later in the series, at which point Morrison . It also features a character - Psycho Pirate - who.
 * The Gargoyles comic, written by the series' original head writer and officially promoted by Disney, ignores the third season, save for the first episode, which it largely retells with the first two issues.
 * This seems to happen to Spider-Man often:
 * One series written out of continuity was Spider-Man: Chapter One, which ineptly updated several bits of Spider-Man's origin; for instance, the Sandman and Norman Osborn were now related, as a way to explain their similar-looking hair.
 * In the one-shot The Osborn Journal, Norman Osborn claimed in his private journal to have had nothing to do with Aunt May's death in Amazing Spider-Man #400. Two years later, it's revealed he kidnapped her and had an actress fake her death, with no mention of his earlier claim otherwise. Marvel's Spider Girl comic, however, sticks to the Journal's perspective rather soundly, and the real May Parker is said to have been the one who died in Issue 400.
 * Marvel's vague statements either took Trouble out of continuity or implied that it never was in continuity. This series depicted Peter's Aunt May as an unwed teenager and implied she was really his mother.


 * Mark Millar ultimately tried to salvage Trouble as canon in the last issue, trying to establish it as taking place in the Ultimate Marvel Universe via having reference be made to the Ultimate Marvel version of Bucky Barnes (who survived the war and became a famous writer). However, no one else has bothered to pick up on it and it's still pretty much a stand-alone story.
 * Either way, Trouble puts itself out of continuity through Writers Cannot Do Math: if May was a teenager when Peter was born, how is it that she's in her sixties (616 Universe) or fifties (Ultimate Universe) fifteen years later?
 * The writers of the Disney Adventure Power Rangers SPD comic conveniently Retcon the reasons behind A-Squad's defection, turning it into Mind Control instead of a voluntary Face Heel Turn.
 * The infamous "25 Years Later" arc of the Archie Comics Sonic the Hedgehog series depicted two different alternate futures for Mobius, one of which was ironically created as a result of attempts to change the other. Neither one was mentioned again after the arc ended. Even more egregiously, the character of Lara-Su, Knuckles' and Julie-Su's future daughter and a major player in the arc, vanished along with it, even though her character was introduced in yet another alternate future story written before "25 Years Later".
 * The "X Years Later" timeline was revisited in a Sonic Universe story, while a later one featured the alternate version of Lara-Su (who was a separate person from the one who appeared in "25 Years Later".
 * Jon Sable Freelance: Creator Mike Grell's later uses of Jon Sable have ignored the 27 issues of Sable written by Marv Wolfman.
 * In the finale of The New Titans, Starfire is revealed to be pregnant. It's never mentioned again.
 * A storyline in Justice League Europe revealed that Doctor Light's Ice Queen behavior was the result of chemicals in a popular soda she enjoyed drinking, leading to the character becoming more personable once she kicked her habit. This was completely ignored by later writers, who brought back her rude, condescending personality with no real explanation.
 * The third volume of the Teenage Mutant Ninja Turtles comic book, published by Image Comics as the official continuation to the Mirage-produced series, was completely ignored when TMNT co-creator Peter Laird returned to write volume 4.
 * In the rebooted series The Hulk, an angry response to writer/artist John Byrne's reboot of the title character, particularly his "Man of Steeling" of the Hulk in Annual #1, was responded to in the title's letters page by something along the lines of, "When you not like what happen, do what Hulk do: Pretend it never happened." Thus, the six issues and an annual were simply removed out of existence.
 * During Peter David's "Tempest Fugit" storyline, one line discontinuitized the entirety of previous writer Bruce Jones' 42 issue run.
 * A particularly brutal version happened in the first issue of the ClanDestine/X-Men mini-series. In one line of dialog, Alan Davis (Clan Destine's creator and artist/writer on the original Clan mini) rendered the entire second half of the original mini (i.e. The Issues He Didn't Write) as All Just a Dream.
 * The 2006 series of The Warlord has been largely ignored in The DCU continuity. With the 2009 series continuing the original series, it seems the 2006 series has slipt completely into the realm of Canon Discontinuity.
 * And Mike Grell's 1992 mini-series off-handedly dismissed the death of Tara which occurred in issues after Grell left the original series.
 * And the new series seems to ignore Mariah's decision to willingly partner herself with a man who physically abused her. Grell has restored her to her original Action Girl Adventurer Archaeologist persona.
 * Countdown to Final Crisis was almost discontinuity. Grant Morrison's Seven Soldiers led into Final Crisis but Countdown did not. However, Morrison (who also wrote Final Crisis) was forced to cave in and acknowledge Countdown via a time loop scenario: Darkseid wasn't killed at the end of Countdown but thrown backwards in time and possessed the mobster who would become Boss Dark Seid, resurrecting his minions in human bodies and consolidating his power base while waiting for his "death" so that he could kill his son and bring the corrupted-by-regular-Darkseid Mary Marvel into his inner circle.
 * Alternatively, Darkseid fell backwards through time after the events of Jim Starlin's Death of the New Gods... but Morrison has stated that the true final war of the New Gods was fought on a higher plane than mere mortals could comprehend, and that both Countdown and DoTNG were merely the mortal characters'/writers'/artists' hopelessly limited, three-dimensional perception of what really happened.
 * Years before the Continuity Snarl of Hawkman, there was a story, in the original Silver Age 1960s Hawkman series, which threatened to reveal Carter Hall's identity as Hawkman. He ended up protecting his identity but publicly revealing that he's a space alien. Needless to say, this was ignored later.
 * An odd example is Sovereign Seven, a team of humanoid aliens created by Chris Claremont for DC Comics. They were part of the Genesis Crisis Crossover, and at one point Power Girl became a member of the team. And then, in the final issue, it turned out they were entirely fictional within the DCU. This appears to have been for the opposite reason to most Canon Discontinuity; Claremont wanted to separate his (creator-owned) characters from The Verse once his book was cancelled.
 * New Avengers: Illuminati #3 has been treated as such, due to the sheer level of Critical Research Failure on the part of Bendis regarding the original Secret Wars series and Beyonder.
 * The 1990s Metal Men miniseries reveals that they are actually human minds in robot bodies and has Will Magnus become Veridium, a Metal Man based on a fictional metal. This change was not well received and quietely dropped from continuity, along with the Metal Men themselves. When Magnus appears as one of the main characters of 52 he refers to the '90's series as hallucinations resulting from a psychotic break, and now takes regular anti-depressants to help keep his mind in one piece.
 * The "Life and Death of Johnny Alpha" story in Strontium Dog has explicitly relegated all of Peter Hogan's stories to the realm of In-Universe Fanfic. Garth Ennis' contributions seem to have actually happened.
 * DC Comics has a series of books entitled The Greatest Stories Ever Told, each featuring one character or theme. A Batman volume came out in the late 80s, followed by a volume 2 in the early 90s. V2 was released opposite Batman Returns, and features all Catwoman and Penguin stories. Decades later, DC revived its Greatest Stories series, reprinting the first Batman volume . . . and produced an entirely new Greatest Batman Stories Volume 2, shoving the previous V2 into no-man's land. (By amusing coincidence, the first volume of Batman stories was the second Greatest Stories volume overall (after Superman), and thus had Greatest Stories Volume Two on the spine. So, at a casual glance, all three different books appear to be "Volume Two" of the same series.)
 * DC ran an event called Origins & Omens, which had each book featuring an ominous short story hinting at future plots. The Teen Titans story featured several major revealtions, such as Blue Beetle kissing Wonder Girl, Sun Girl becoming pregnant with Inertia's child, and Kid Devil being turned into a withered husk. With the exception of Static joining the team, literally all of these plot points were ignored.
 * Devil's Due Publishing's entire seven-year run of G.I. Joe: A Real American Hero (including numerous side titles), intended to be a continuation of the original Marvel storyline, was segregated to its own continuity after IDW Publishing took away the comic book rights from DDP. IDW now publishes its own continuation of the Marvel run (penned by its original writer Larry Hama), reprinting the Devil's Due run under the title of G.I. Joe: Disavowed.
 * Orson Scott Card's Ultimate Iron Man revamps Tony Stark in a way that was ignored by every other comic featuring Ultimate Iron Man, creating Continuity Snarl. Mark Millar explained it as that Ultimate Iron Man is a Show Within a Show in the Ultimate Universe.
 * At one point in X Men, the lineup at the time were killed and resurrected, making them invisible to cameras, and this is treated treated almost as a second mutant power in the next few dozen issues. When Chris Claremont left, however, this was completely forgotten, and the lineup at the time - which includes Wolverine, of all people - are seen on camera without comment from then on. His run in 2000 makes a brief mention of this fact with Rogue, but this only serves to muddy the waters further - where it's been mentioned at all, it's explained as a side effect of the Siege Perilous, except that Wolverine and Longshot never went through it, and Rogue did.
 * Nextwave is probably the oddest example of this trope ever made. Officially, it is Canon Discontinuity, but most fans (and quite a few writers!) treats the act of making it discontinuity as a discontinuity in and by itself. This has caused some of the lunacy contained within the series (mainly the parts containing Aaron Stack and the other team members) to spill into the Marvel mainstream.
 * Secret Invasion ignored the X-Statix Presents: Dead Girl mini-series, where the Avengers member Mockingbird appeared in the afterlife. Invasion established that Mockingbird had never really died in the first place, making the series moot. However, the series' artist Nick Dragotta did later imply the events of the series were somehow still canon when discussing the new Miss America he created for the Vengeance mini-series, making the Dead Girl's canonicity difficult to determine.

Other

 * A couple of things from the Bionicle storyline:
 * The Toa Mata's fight with their Shadow Toa clones from the first book is now considered non-canon. Word of God says he prefers his own version, in which the Toa defeat their own clones, rather than each-other's.
 * This isn't the only instance of the official novels' content being ignored in favor of another variation of the same scene. Take the Toa's climatic first battle against the Makuta and the fight against the Manas crabs that lead up to it. In the very first book, Tale of the Toa, the Toa in their Kaita mode defeat two Manas using trickery and their own Elemental Powers. In the Mata Nui On-Line Game, they defeat a horde of Manas by spectacularly destroying their energy towers. Then, still in the game, they go on to participate in an epic clash with the Makuta. In the book, they just walk out of the cave after dealing with the Manas, and Makuta never appears. Guess which is canon nowadays?
 * The introduction of the movie The Legend Reborn. It has so many things that clash with the storyline's continuity, whether established previously or afterwards, they simply chose to ignore it. That is not to say the events themselves didn't happen. They just happened in a way that contradicts the movie's visuals (like Mata Nui's island is shown being covered with lush jungles when according to canon, it was a barren wasteland).
 * A couple of things from the on-line clips and the first movie trilogy also get ignored, most infamously the shipping scenes, as there came to be a No Hugging, No Kissing rule.
 * Taxi crabs were also considered dis-canonized for years because the writer didn't like the joke. They have slowly drifted back into canon territory, though.
 * This is essentially what a marriage annulment amounts to. In a divorce, a marriage is officially declared to be over; when a marriage is annulled, however, it is considered never to have been a valid marriage in the first place. In times when divorces were significantly harder to get, many people would find a reason for an annulment.
 * The annulment/divorce distinction is a specific manifestation of a greater issue in contract law: some contracts can be declared void, i.e., considered to have never been formed, for reasons such as misrepresentation, one party being a minor who did not get adult consent, among other things, while other contracts are "voidable"—they were valid contracts up to a point where one party's behavior rendered them void.
 * Coca-Cola's official history at its website doesn't mention New Coke at all. Nor does its corporate museum.
 * When former assistant football coach Jerry Sandusky was arrested on charges of sexually molesting teenage boys, students at Penn State painted him out of a mural showing all the present and past coaches of the football team, replacing him with a blue ribbon.
 * Neither Benedict Arnold's name nor his face appear on memorials to him at the site of the Battle of Saratoga or on the formal roll of past commandants of West Point at the U.S. Military Academy (only the date, 1780, appears where his name would be), since despite real military accomplishments that twice saved the Continental Army's bacon during the American Revolutionary War, he is remembered today primarily for selling out to the British (if you're American) or being sufficiently mercenary to make what he saw to be the best of a bad situation (if you aren't).

Video Games

 * Epic Mickey deliberately ignores the fact that Oswald the Lucky Rabbit still appeared in cartoons for many years after Disney lost him. This may be justified by that the Disney and Lantz Oswald are treated as two separate characters, but there isn't even an implication given that Ozzie starred in more shorts after Walt lost him.
 * Satoru Iwata declared that the true "current" state of the Star FOX series is either after Star Fox Assault or somewhere before Star Fox Command. More than likely to be the former than the latter, if current information is any credible, as whilst the appearances of the cast in Super Smash Bros Brawl do make some slight reference of certain of Command's plotlines, they otherwise seem to resemble and behave like their appearances in Assault far more. Specifically, Fox McCloud and Krystal's relationship problems from Command are alluded to in their profiles, but otherwise they're still together and Krystal is still a member of Star Fox (as opposed to joining Star Wolf), Panther Caruso does not speak in third person and the ships are all pre-Command.
 * Epic has admitted that Unreal Tournament 2003 is not a complete game, first by refining the original game into Unreal Tournament 2004 with many of the previously missing features and offering a rebate to 2003 owners who bought 2004, then by numbering the sequels Unreal Tournament, Unreal Tournament 2004 and Unreal Tournament III. Strangely enough, the backstory of 2004 doesn't override that of 2003, claiming that every event of 2003 happened. (Such as Malcolm being defeated by Gorge) The same can't be said for the original Unreal Championship.
 * After Singletrac died, 989 Studios took over the Twisted Metal series and produced the third and fourth games. Once Incognito Entertainment (a studio consisting largely of Singletrac employees) regained the rights to the series, they made Twisted Metal Black, which was much Darker and Edgier than the original two games and set in its own continuity. The only PSP entry in the franchise so far, Head-On, is set after the second game and ignores the 989 entries. The post-989 entries were much better received, anyway. This to the point that "Head-On" is considered by fans to be the "true" Twisted Metal 3.
 * All the Castlevania games (barring the parody game Kid Dracula) were part of the canon in some form or another until Koji Igarashi (the director of Castlevania: Symphony of the Night) took over the series as producer during the development of Castlevania: Harmony of Dissonance, removing the two Nintendo 64 installments, Legends, and Circle of the Moon from the official timeline. Igarashi clarified that the N64 games and Circle of the Moon were still canonical, but were demoted to "side-story" status. Castlevania Legends on the other hand, was officially retconned out of the series' continuity and is now regarded as an alternate universe story. This was likely due to the implication at the end that Alucard fathered Sonia Belmont's child, thereby making all future Belmonts into descendants of Dracula. Although, if that is the case, it makes it a very self-defeating retcon—when Alucard was only implied to be the child's father, the execs had some wiggle room, whereas as striking it out of canon so vehemently does a very good job of confirming fan's suspicions that Alucard is the child's father—as otherwise, why even bother with it?
 * Although such an implication fits startlingly well with the recent Order of Ecclesia's reliance on Dracula's own power to defeat him.
 * Part of this was also due to Igarashi stating in interviews that he does not feel female characters can make for strong heroes and removed Legends simply because Sonia was a woman. Order of Ecclesia might contradict that but Shanoa was rather timid and subservient.
 * Shanoa's emotions and memories were wiped at the beginning of the game and didn't return until the very final moments. She was only subservient since she only knew to serve Barlowe for the short time after losing her personality. As for her being timid, before losing her memories, she flat out told Albus that she was his equal and was going to do what she wanted, and, after losing them, despite the game saying she was unable to feel anything emotionally, she seemed like she was still able to express anger and sadness and came off as aggressive sometimes, which would make since when you consider that those are negative emotions and Dracula's power was responsible for her state throughout the game.
 * Capcom has all but said that Devil May Cry 2 doesn't exist—for instance, Dante is a playable character in Viewtiful Joe for comedic reasons, and he outright says "I don't remember that" when Alastor references the events of Devil May Cry 2.
 * To further illustrate how much Capcom denies DMC2, the game after it, DMC3, is a prequel to the series - About as far from the events of the second game that one could get from without acknowledging it.
 * And DMC4 is set years after DMC1, yet still before anything to do with DMC2. They're really going out of their way to avoid that one.
 * This happened to both a good chunk of Fallout 2 and almost all of Fallout Tactics. The former for the reasons stated below, the latter because many of the elements contradict the original game. On the other hand, Bethesda seems to have the position that it's valid if it doesn't contradict anything, in relation to 2, and events are canon, details are not, regarding Tactics. Specifically, when asked about Super Mutants, a Brotherhood Scribe lists fighting them on the West Coast and then near Chicago.
 * Interplay and Black Isle had also dismissed them soon after release, and the tattered remnants of the dev team contributing to the Fallout Bible continue to do so.
 * The original ending of Fallout 3 was... vastly unpopular, to say the least. The Broken Steel DLC retcons it entirely.
 * Chris Avellone, one of the head writers for Fallout 2, created a series of Fallout Bible posts which made a good portion of the game, particularly the overwhelming number of cheesy pop-culture references, non-canon. Nearly everything that happened in the town of Broken Hills is non-canon.
 * Fallout 2 and Tactics are at least mostly true and true in Broad Strokes, respectively. Fallout Brotherhood of Steel is entirely removed from canon.
 * Fallout: New Vegas however is full of nods to Fallout 2.
 * On the subject of Bethesda, suddenly realizing that multiple endings of the second game in The Elder Scrolls series would have been a great idea for the end of a series, they averted this trope fully by declaring all SIX endings canon. It's now listed in Canon as the Warp in the West, transforming 44 quarreling city-states into five loyal countries literally overnight.
 * In the late 90's, Konami farmed out the development of two Contra sequels to Hungarian developer Appaloosa (best known for the Ecco the Dolphin series). Contra: Legacy of War for the PS1 and Saturn in 1996, and C: The Contra Adventure for the PS1 in 1998. Neither game were that well-received by fans and critics alike. In fact, Konami even canceled plans to release a Japanese version of Legacy of War. In 2002, Konami commissioned Nobuya Nakazato (director of Contra III and Hard Corps) to develop the PS2 sequel, Contra: Shattered Soldier. The unlockable timeline of the game mentions all of the past Contra games, with the notable omissions of Legacy of War and Contra Adventure (and Contra Force, but that was just a Dolled-Up Installment to begin with). As a side-effect, the English localization of Shattered Soldier also followed the original Japanese timeline instead of the alternate American timeline, which had the earlier games set in the present instead of the future, and Bill and Lance replaced with their "descendants" Jimbo and Sully in Contra III.
 * When the NES port of Metal Gear proved to be successful, Konami commissioned one of their teams to developed a sequel for the American and European market titled Snake's Revenge. This sequel was made without Hideo Kojima's involvement and when he was told about it, he decided to make his own sequel for the Japanese MSX2 titled Metal Gear 2: Solid Snake. The Metal Gear Solid series follows the storyline from Metal Gear 2 rather than Snake's Revenge.
 * Monolith Productions chose to ignore the two F.E.A.R. expansion packs (which were made by a different company) when they started development on the game's real sequel.
 * Halo's continuity policy directly addresses this; new material automatically overrides old material in the event of a contradiction, while the games override the books, which in turn override promotional materials like the "Believe" ad campaign.
 * Myst is a little more complicated, as it involves multiple Literary Agent Hypothesis. The first two books (Atrus, Catherine) do not mention the D'ni society as having slaves, just a caste system. Book of D'ni makes it explicit that slavery is repugnant to D'ni society. Then Uru came out, with the storyline's finale in Myst V... Again, it seems the author of the books "based" his writings on Catherine's journals, which dismiss the clear slavery of the Bahro, for never entirely cleared reasons. As for Book of D'ni, well, people long gave up making sense of it.
 * That's far from the only Canon Discontinuity in the Mystiverse. Prison books? Prison Ages? Your guess is as good as Dr. Watson's!
 * Nintendo has outright stated that The Legend of Zelda CDI Games games never happened. This is taken to such an extreme that an issue of Nintendo Power describes The Legend of Zelda Spirit Tracks as the first game which Zelda is a (semi)playable character. She was fully playable in two CDI games.
 * On that note, Hotel Mario can be thrown here as well.
 * The premise of Super Mario Bros. 2, with its All Just a Dream ending has been entirely ignored by the Mario canon, since all of its supposedly "wacky dream characters" (who were not Mario characters at the time, see Doki Doki Panic) have since been shown to be residents of the normal Mario universe. It's also notable that for a franchise that enjoys reviving old premises from long-ago titles, no characters, settings, or items from the two Game Boy titles, other than Wario and Princess Daisy, have been used in subsequent games.
 * When British game publisher U.S. Gold got the license to produce ports of Strider for home computers in Europe, they took the liberty of producing an exclusive-sequel titled Strider II, which was later remade for the Sega Genesis and Game Gear and released in America under the title of Journey From Darkness: Strider Returns. Capcom later got to make an arcade/PS1 sequel titled Strider 2, which completely ignored U.S. Gold's own sequel.
 * A variation that didn't have anything to do with quality occurs in the God of War franchise. In the first game, in an unlockable video Yet in the second game,  The director of the game acknowledged this error in the extras, and states that he was disappointed that they revealed it in the first game, because he finds it more fitting for it to be dropped on Kratos after he is denied his vengeance. He openly said that he doesn't care about the error.
 * The creators of the Star Control series have made it clear that Star Control 3, which was made without their input and was met with overwhelming fan backlash, never happened. So no, the Precursors
 * Word of God has revealed that some of the things in it are what the creators had intended to do if they'd gotten to make their own sequel, though—such as the part about the Mycon actually being biological terraformers created by the Precursors whose programming has become distorted into a bizarre religion.
 * Homeworld fans are still trying to figure out if outsourced midquel Cataclysm is canon or not, the Homeworld 2 dev-team being somewhat non-committal on the subject and some of its technological advances showing up in the sequel but not others. And it's not clear if the MacGuffin made of Forgotten Phlebotinum that appears in the sequel, whose nature flatly contradicts the first game's manual, is a clumsy retcon or a result of the new creative team not bothering to read the fluff.
 * Command & Conquer: Red Alert 3 seems to ignore Red Alert 2's Expansion Pack, Yuri's Revenge; The third game's starting cinematic starts with the Soviet Union defeated while both of YR's endings had them surviving (conquering the world in the Soviet one, teaming up with the allies to take down Yuri in the Allied one).
 * Red Alert 3 takes place in an alternate Red Alert setting. The very intro movie explains this. RA3 says that a time machine was used by the Soviets at the end of RA2, to destroy Albert Einstein and prevent the allies from developing several key technologies. Nevertheless, FutureTech creates very similar technologies anyway but because of the change in timelines, the Empire of the Rising Sun exists in RA3 when it wasn't supposed to exist at all in the previous timeline (this is in fact part of the last 4 missions in the Empire of the Rising Sun campaign).
 * But the intro movie begins with the Soviets in grave danger, which is why they use the time machine to kill Einstein. So, the contradiction stands, although it's not too much of a stretch to imagine that another war occurred after Yuri's Revenge. Besides, this is a series with towers that shoot lightning, mind-controlled giant squids, and man-cannons that shoot parachuting armored war bears.
 * It's possible that Red Alert 3 never was the same continuity. It was already an alternate universe of Red Alert in the first place, and the time travel just made it even more different.
 * Discontinuity becomes trickier when time-travel is around, but the original canon was that Red Alert was a prequel to the Tiberian series. That worked well up until Red Alert 2, when fans had to resort to tricks like suggesting the Tiberian timeline developed from the Soviet ending in RA1 or theorising further time-travel down the line to make sense of it. By Red Alert 3, the continuities were officially split.
 *  World of Warcraft ignores most of what is said in the Warcraft tabletop game. Especially considering Whitewolf and Blizzard Entertainment broke off ties. This is something of a rarity for Blizzard, who have a history of standing by licensed works and their storyline elements.
 * That said, any time something happens in WoW that directly contradicts established canon in the RTS games takes precedence, often stated as being "ongoing shifts in artistic leaning" or the like. Certainly not because they just forgot the old story and never went back to check on it before finalizing the new info. Even when one of the writers specifically states that to be the case. See: the entire backstory of the Draenei: Originally, the Eredar were one of the races that corrupted Sargeras; now, Sargeras was already corrupted by the Nathrezim by the time he got to them, and he corrupted them, with the Draenei being that faction of the Eredar who resisted his corruption.
 * Now the RPG is completely considered uncanon, with exception of information used from the RPG in canon.
 * A rather odd case for Banpresto's Super Robot Wars Original Generation: Original Generation (OG1) lets players choose between Ryusei Date and Kyosuke Nanbu, whose stories co-exist with one another for the first half of the game. It's only until the second half events unfold differently for either character. Come Original Generation 2 (OG2), events state only Ryusei's second half of OG1 happened; Kyosuke's second half is never mentioned at all. While this drops loads of Foreshadowing from Kyosuke's second half of OG1, fans were quick enough to deduce Banpresto did this to show that OG1 was never meant to be played in favour for Kyosuke, but the sequel was, since the game was primarly focused on his story from Super Robot Wars Impact.
 * Strangely enough, Kai Kitamura seems to know the other members of the cast very well, even though he's a permanent character in Kyosuke's route.
 * Ironically, to celebrate SRW's 15th anniversary, Banpresto released Original Generations (OGs), a Video Game Remake on the PlayStation 2 of both GBA games, which sets itself as Canon Discontinuity by rehashing the storyline to include Early Bird Cameoes, new Humongous Mecha, the cast of Super Robot Wars Reversal, new characters and a major personality change to Axel Almer.
 * Oddest case ever: Leisure Suit Larry 4. It doesn't exist. It's not just non-canon, it was never made. Yes, Al Lowe jumped from 3 straight to 5.
 * This works itself into the plot of Larry 5 interestingly: Because the 4th game was never released, both player characters have no recollection of what happened after Larry 3.
 * The lack of Leisure Suit Larry 4 even became a plot point in Space Quest 4. Vohaul had corrupted the master disks and used them to take over Xenon.
 * The real-life explanation is, of course, that they couldn't think of a good way to get a sequel out of Larry 3's happy ending, so they just did a sequel anyway and made the continuity errors it produces part of the plot.
 * The story goes that Al Lowe, the creator of Leisure Suit Larry, had sworn that there would never be a LSL 4... before agreeing to make another Larry game. To keep his oath, he made Larry 5 and simply had the characters reference Leisure Suit Larry 4: The Missing Floppies, a title that exists in the game's plot, but not in the real world. The cleanup for the plot from LSL 3 was an added bonus.
 * Another Sierra example is that the widely-derided King's Quest Mask of Eternity has never shown up on any of the compelation CDs of the series and has only since been re-released on Good Old Games.
 * After a  in Sonic the Hedgehog 2006, the entire game erased itself from continuity via temporal retcon. A bit Hilarious in Hindsight, too: after firing the writers, SEGA wisely decided to pretend the entire game never happened, as well.
 * This is made confusing because, despite the game being ERASED FROM TIME, it still appears in Sonic Generations! And Sega has yet to comment.
 * Legend of Mana, originally marketed as "Seiken Densetsu 4" (and possibly a direct sequel to Seiken Densetsu 3), is now not considered by Square-Enix to be part of the main World of Mana continuity.
 * Its Japanese name is "Seiken Densetsu: Legend of Mana" (there is no 4), which means that everybody assumed that this was the 4th game in the main series.
 * Switching up the elements (replacing Moon with Metal) probably didn't help it much.
 * Touhou is an interesting example. The first five games were made for the PC-98. The rest of the series is for Windows. The Windows games make very few references to the PC-98 games, and what little that carried over is greatly changed. The fanbase is split on whether or not this trope has taken effect, somewhat exacerbated by ZUN only saying that we could ignore the PC-98 games when questioned about them instead of anything stronger.
 * Radical Dreamers, the text-based first sequel to Chrono Trigger (and Japan-only) was completely thrown out of series continuity by the later PS 1 sequel Chrono Cross, which was also something of a remake of Radical Dreamers. The events of that game are thrown into an alternate reality... or something. Series creator Masato Kato originally had much greater plans for Radical Dreamers but the entire game was rushed. Chrono Cross was his way of finishing off his original planned story.
 * In a cross-medium example, all Aliens vs. Predator games seem to ignore the existence of Alien: Resurrection by depicting xenomorph encounters, Weyland-Yutani xenomorph research facilities, and at least two completely infested planets known to Company executives at a time when the species is supposed to be extinct in known space. The latest game, however, acknowledges one of the Alien vs. Predator films; however, it ignores all previous games.
 * While not entirely declaring them non-canon, Yoshio Sakamoto said that he did not take the plots of the Metroid Prime games into consideration in the making of Metroid: Other M. This leads to some weirdness when Samus mentions that this is the first time she's undertaken a mission alongside the Federation when she already did that in Metroid Prime 3. However, these are minor plot holes in a series riddled with them. The fact that the Prime sub-series was American-made and told its own story instead of furthering the plot of the Japanese games may have had something to do with this.
 * Mortal Kombat 2 ended with Shao Khan being rather spectacularly blasted to chunks (which, among other things, allowed Sonya Blade and Kano to escape back to Earth, so it had to have happened.) Mortal Kombat 3 began with Shao Khan alive and still ruling the Outworld with an iron fist. No one at Midway has even attempted to explain this.
 * A much bigger development occurred recently: the latest installment to the series - titled simply "Mortal Kombat" - erases everything that had occurred after the first game. While characters from subsequent games (such as Quan Chi, Cyrax etc.) still exist and make appearances, everything has started afresh.
 * This development has been taken as Midway/Netherealm Studio's attempt to persuade the gaming community to cast the last handful of lacklustre titles from their minds.
 * The simple title is meant to reflect this: the series is starting over.
 * The game (which is informally known as Mortal Kombat 9, to reflect continuity) is actually the result of a Cosmic Retcon at the hands of Raiden, and thus previous games are still canon. The game actually picks up directly where the previous game, Armageddon, left off, so its pretty up-front about this fact. The apparent contradictions of things like Quan-Chi being present so early in the story can be justified by
 * In 1993, Nihon Falcom commissioned two separate companies to developed their own versions of the fourth Ys game. Ys IV: Mask of the Sun was released by Tonkin House for the Super Famicom, while Ys IV: The Dawn of Ys was released by Hudson Soft for the TurboGrafx-16 Super CD (a third version was also planned for the Mega Drive, but it was never released). Ys V was later developed by Falcom and exclusively for the SFC, and all the later Ys sequels followed the SFC games. The 2005 PlayStation 2 remake of Ys IV was even based on the SFC version.
 * Bomberman: Act Zero is not a part of the main Bomberman continuity, both on account of it being a radical departure from the series' light-hearted mood and from it being a rather terrible game on its own.
 * The Duke Nukem games "Time to Kill" and "Land of the Babes", for the original Playstation, while decent in their own right, aren't regarded as canon. The fact that they were made by different developers probably has something to do with that. Neither is the N64-exclusive installment Zero Hour, supposedly.
 * Soldier of Fortune: Payback was produced by a low-budget developer, seemingly with a Game Maker program, disregards the characters and story of the previous games.
 * When it first came out in 2003, Tron 2.0 was supposed to be the official sequel to the movie Tron, since it seemed almost certain that Disney would never make a second film. Seven years later, when they actually did release another movie, the continuity differences between Tron: Legacy and 2.0 proved irreconcilable, so 2.0 was rendered non-canon.
 * It's a general rule within Pokémon that the canon game is the third game (Blue, Crystal, Emerald, Platinum, etc). If a previous game is referenced to it's always the third game, which is a mixture of the original two with changes.
 * Pokémon Yellow seems to be the only exception, as there are plenty of hints in G/S/C that R/G/B are the canonical Generation I games rather than Yellow: G/S/C's Cerulean City featuring the house of man who trades Pokémon in in R/G/B rather than its Yellow counterpart with the girl who gives the player Bulbasaur (and even the man himself), the Yellow-exclusive house in Route 19 being absent, or Blue's party being based on that of R/G/B rather than Yellow.
 * Pokémon Yellow seems to be the only exception, as there are plenty of hints in G/S/C that R/G/B are the canonical Generation I games rather than Yellow: G/S/C's Cerulean City featuring the house of man who trades Pokémon in in R/G/B rather than its Yellow counterpart with the girl who gives the player Bulbasaur (and even the man himself), the Yellow-exclusive house in Route 19 being absent, or Blue's party being based on that of R/G/B rather than Yellow.