"They're like locusts. Moving from planet to planet, their entire civilization. They consume every resource, and then they move on."
Planet Looters are a race of aliens that have run out of something, and must steal it from others. Frequently, from us here on Earth. This is a bit peculiar in that their demonstrated level of technology makes one wonder why they'd target Earth when it would be far easier to find an uninhabited planet and strip-mine that.
To Hand Wave that problem, they often need some particular resource which is supposedly rare except on Earth. Water is apparently one of them. Countless aliens have needlessly lost their lives in futile attempts to steal Earth's water. For some reason they overlook comets, dwarf planets and moons in the outer solar system which are not only made of mostly water in convenient prepackaged frozen form but don't have anyone out there to stop them from simply flying away with it.
At other times, we are the resource, and they want to take us as slaves or tasty, tasty food. Neither of these really make sense either. If they need food, they might as well go steal the cattle equivalents on several planets that should be much closer, with even less native hostility. As for slavery, it's hard to imagine any advanced race that has figured out interplanetary space travel would need slaves for any reason other than to fulfill a cultural or religious need to conquer the galaxy's "weak".
Another way around the question is to make Earth's abundant ecosystems and temperate climates the resource, and the aliens view primitive humans as unworthy pests infesting an ideal new home or vacation spot.
Usually results in an Alien Invasion. Compare Horde of Alien Locusts, Planet Eater, and Mars Needs Women.
Anime and Manga
- Arguably, Medical Mechanica from FLCL fits this category.
- The Saiyans and their employers, Frieza's people in Dragonball Z regularly ravage entire worlds of their population for sale to the highest bidder. And destroying them if they think it won't sell well enough.
- Inverted in Macross Frontier, where, due to the severe damage suffered by the Frontier fleet, and the dwindling resources (it's stated that they will last for two or three months maximum), the government decides to attack the Vajra homeworld and break through the Vajra defenses, hoping to colonize it. At one point, one of Alto's wingmen deliberately comments "This planet is ours!" while blasting away at the local inhabitants.
- In Vandread, this is true for the Earthlings, harvesting colony worlds to replace their own organs.
- In the Wildstorm comic Majestic, it's discovered that the Sufficiently Advanced Alien Kherubim seeded many worlds with Planet-Shaper Engines, which terraform the surface and allow life to evolve; when that life becomes smart enough to do useful work, the Planet-Shapers will generate a flood of genetically recreated Kherubim to conquer said planet and enslave said life, thus spreading the race across the galaxy. Earth is one of those worlds, with a ticking Planet-Shaper under the mantle just waiting to unleash an army of superbeings (luckily it gets dismantled by Majestic). Ironically, their supposed homeworld Khera was also the result of such a seeding; the Planet-Shapers there did their thing millions of years ago.
- The Evronians from Disney's Paperinik New Adventures series use weapons that drain all emotions from a sentient victim and convert them into energy (the will-less victims are then used for menial labor). However, since their whole infrastructure is built on using this emotional energy, and you can only ever drain one victim once, they are forced to conquer new planets constantly. Their own scientists know this is unsustainable, but few dare voice that opinion.
- The Horde from Strikeforce: Morituri. All of their technology was stolen from others, and the only reason they got off their homeworld in the first place was by stealing from (and slaughtering) the alien ambassadors who visited them.
- Calvin from Calvin and Hobbes once wrote a poem about such aliens visiting Earth. It's too large for the main article, but can be found on the quote page.
- The aliens from the movie Independence Day. The President finds this out via an attempted psychic attack about halfway through the movie, which prompts him to order the military to Nuke'Em.
- For unexplained reasons (but given the demeanor of President Skroob, most likely government mismanagement), the denizens of planet Spaceball, from the Mel Brooks sci-fi spoof Spaceballs, must steal air from other planets to supply their world's thinning atmosphere.
- In Men in Black II, a criminal alien releases one of her old partners in crime from The Men in Black's prisons. This convict's crime was that he tried to steal the Earth's ozone layer.
- Exeter and his men in the disputed classic This Island Earth needed uranium to power their energy shield...but they aren't aliens!
- The uranium was needed just long enough for Exeter's race to relocate to Earth, presumably killing all humans in the process. (Although to his credit, Exeter tried to convince his boss that the humans should stay untouched.)
- The plot of Star Trek: Insurrection revolves around The Federation trying to loot a planet of its Fountain of Youth Phlebotinum. Whether you side with the villains or the heroes on this issue is YMMV.
- Inverted Trope in Avatar and Delgo, where militant Earthlings are looting an alien planet for literal Unobtanium and a place to live, respectively, after making their own planet a Crapsack World. Diplomacy was attempted in Avatar, but by the time the film starts it's broken down.
- In Battle: Los Angeles, the invaders are theorized by scientists in-universe to require liquid water, which is why they are invading Earth. Their exact motivations are unknown, because the aliens don't talk much, except with their guns.
- In Transformers: Dark of the Moon, the reason why Megatron and Sentinel Prime want to pull Cybertron into Earth's atmosphere is to use its inhabitants as slave labor in its reconstruction. This would probably destroy Earth, but why would the Decepticons care?
- Cowboys and Aliens reveals that the aliens are on Earth to mine gold. It's not entirely clear why they need gold, but they have no problem destroying entire planetary civilizations to do that. They have already destroyed at least one other civilization.
- To be fair, gold IS a fantastic conductor of electricity.
- Older Than Radio: The Ur Example is The War of the Worlds, by H. G. Wells, published in 1898. The book depicted a Martian invasion with overt analogies to European hegemony. The invaders have perfectly good reasons: according to contemporary theories, outer planets are the first to form and the first to die. With spaceflight in the Jules Verne steam cannon stage, the aliens have nowhere to go but inward. The novel heavily implies that when the invasion of Earth doesn't go well, the Martians take over Venus.
- Inverted (perhaps deliberately) in CS Lewis' Out of the Silent Planet, which has humans as the planet looters trying to conquer Mars—even though the solar system runs under the same theory as Wells', and the Martians point out that their world will die before Earth.
- In a rare example of humans doing it to other humans, the People's Republic of Haven from Honor Harrington regularly conquers and loots other planets simply to prop up their own failing economy. Things turn ugly when they try to do it to the Star Kingdom of Manticore and their Short Victorious War turns into a long and bloody one. Making matters worse for Haven is the fact that unlike a lot of nonhuman Planet Looters, the Havenites build their newly conquered planets into their own empire. Which means that each looted planet eventually becomes a new drain on the budget, because the cost of keeping it under control will sooner or later be higher than the rewards of looting whatever is still left after ten or twenty years. The parallels to Ancient Rome may or may not be deliberate.
- L. Ron Hubbard's Doorstopper novel Battlefield Earth is unusual in initially deflating the usual egotistic view of Humanity's place in the scheme of things: the Earth is one of hundreds of thousands of casually conquered and strip-mined planets, marginally notable for having plenty of gold.
- The Psychlos in the Film of the Book specifically mention how much they hate Earth with its blue skies, low gravity, and poisonous air (for them). Their homeworld is shown to be a large planet with purple smog-filled skies almost entirely covered by structures.
- Seriously explored, and eventually subverted, in H. Beam Piper's novel Space Viking. The Space Vikings of the title aren't much interested in raw resources; those are cheap. They want manufactured goods, the more sophisticated (and therefore valuable) the better. The only problem is that a planet with enough of an economy to have good loot can, by virtue of that self-same economy, also field a decent space navy, which can generally beat off a Viking raid, resulting in no loot, but lots of expensive damage to the Viking ships. The protagonist over the course of the novel gradually changes from plunder to peaceful trade mainly because it's more profitable (although he is troubled by the doubtful—to put it mildly—morality of it all, too).
- John Ringo's Posleen from the Posleen War Series. Driven by an extremely high birthrate and strong aggressive/acquisitive tendencies (both of which it's hinted were artificially induced), they want land to farm, humans for food, and refined metals just because.
- In Peter F. Hamilton's Fallen Dragon the mega-corporations on Earth which funded the establishment of interstellar colonies are beginning to decline, so they now make a profit by 'asset realization' -- turning up in orbit and implying they'll blast the colony if the colonists don't hand over various manufactured goods, leaving information on the latest Earth technologies as compensation, then returning several years later to do the same thing again once the colonists have upgraded their technology and gotten back on their feet.
- Stephen Baxter uses Planet Looters in Manifold Space, but the aliens attack any planetary bodies they come across. It's just that there are so many of them (with so many different needs) that sooner or later they'll get to the inhabited ones. All of known space has been picked over repeatedly for hundreds of millions of years.
- The Yeerks from Animorphs. Justified Trope in that what they want from Earth is something that can only be found on Earth. Us. Or more specifically, our bodies with our big, fat brains ripe for infestation.
- In the first book, it's stated that humans would give every Yeerk in the pools a host.
- The Vagaari from Outbound Flight are a nomadic people whose most important resource is slaves from less technologically-advanced peoples. Not only are slaves useful for working and testing, but they can also be put into those clear bubble structures on the outsides of the ships. That way, the people they fight are reluctant to fire and kill innocent captives. Unless, that is, they make an enemy of Commander Mitth'raw'nuruodo...
- Subverted in Dougal Dixon's Man After Man: the invaders in the end are descendants, which recolonized the Earth after stripping other planets off their resources. Guess what happens afterwards.
- Neal Stephenson's Anathem: The Geometers/Cousins, in a roundabout way. Their actual goals are way too complicated to cram into a small example.
- Elliot S! Maggin's novel Superman: Last Son of Krypton includes a scene in which Lex Luthor explains why so many aliens want to conquer the Earth. If you take over Earth you get six billion Earthlings to use as soldiers—so you can then conquer all the other planets in the Galaxy because Humans Are the Real Monsters.
- The free worlds of the galaxy are menaced by hordes of these in Olaf Stapledon's Starmaker, a novel that was written in 1936, so you can probably guess who the "United Empires" were a metaphor for... This use of the trope made rather more sense than most, since the Empires were motivated by a desire to spread their deeply unpleasant militaristic culture, not plundering resources as such.
- The Fermi Paradox Is Our Business Model, a short story by Charlie Jane Anders, offers an interesting and unusual, yet chillingly extreme, example.
- The earlier "The Gentle Vultures" by Isaac Asimov followed similar principles, although the aliens in that one simply used the situation rather than deliberately creating it.
- John Stith's novel Manhattan Transfer begins with aliens tossing a dome over and ripping out Manhattan Island without any obvious explanation, then stowing it inside their massive spacecraft. The people in Manhattan think they have been looted, but it eventually turns out that the race which stole Manhattan is trying to save a sample of humanity from a soon-to-arrive Planet Killer.
- In the Gaunt's Ghosts novel His Last Command we are told that Chaos uses jehgenesh, massive warp beasts, to strip resources from worlds closer to the front for backline worlds.
- A humorous short story by R.A. Lafferty called "Land of the Great Horses" pretends that the Romani are nomadic because extraterrestrials took their homeland (ripped it loose, apparently, right down to the bedrock). They weren't actually looters, though, but scientists who took it for geological examination, instilling a compulsion to wander so the Romani wouldn't settle anywhere else. When the aliens bring the land back in the late 20th Century, everyone with a significant degree of Romani blood feels impelled to return to India. "It's come back, you know." An epilogue reveals that the extraterrestrials sampled Los Angeles next—and haven't brought it back yet three centuries or so later.
- A central theme of the Planet Pirates series by Anne McCaffrey, using the third variation (the planet's colony-safe environment is the resource).
- This is how corporations in Fallen Dragon recoup the massive investments required to build a colony; After the colony has had time to terraform, grow and actually start producing something, the corporation shows up with a well-armed fleet in orbit and start demanding dividends.
- The Tomorrow War by Alexander Zorich has "The Jips" - enigmatic aliens who ride motile asteroid swarms (they got gravitics, unlike everyone else) and seem to just look around. Since it's apparently impossible to meaningfully communicate with them, and it's obviously imprudent to mess with them, the Jips were observed, but left alone. Then suddenly a swarm with one more structure appears and drops a pod on the planet, where it grows and releases a swarm of harvester units slurping up mineral and organic resources - and they are unable or unwilling to see any difference between ores and buildings or cabbage and humans who didn't run away in time. And then, another planet. Everyone starts changing pants and reviewing the list of their sightings. The big problem being that their warrior units maneuver better than any human craft even theoretically could and are equipped with a pair of X-lasers of comparable power, but shoot ten times faster than the typical Human variety. The bigger problem at this point was that it's obviously a good idea to "dissuade" them as fast and hard as possible, rather than risk a protracted war, but it's not clear whether it's possible at all.
- Doctor Who:
- This was the original motivation of the Cybermen—though their choice of victim was somewhat understandable, as humans were among the resources they wanted to strip-mine.
- For that matter, a lot of aliens liked this plot. It turned up in "The Pirate Planet" (where quartz (!) was unique to Earth) and "The Dalek Invasion Of Earth" (where Earth is the only planet in the universe with a magnetic core).
- The first series of the revived Who returned to this trope immediately. The very first episode had a baddie, the Nestene Consciousness, who wanted to feed on the Earth after its own worlds were destroyed in the "Time War". In the episode "Aliens of London", an alien criminal family called the Slitheen took over 10 Downing Street as the first step of a plan to melt the Earth down into a source of radioactive fuel for spacecraft. The titular Dominators of "The Dominators" tried to do the same thing to the planet Dulcis in the Second Doctor era of the original show. In that case the choice of planet was motivated by a conveniently thin crust.
- The Sontarans also do this, as it's very easy to turn Earth into a breeding planet for their species. How easy? They even get the humans to install ATMOS systems on their vehicles, which are designed to wipe out humans and prepare the atmosphere.
- In "Horror of Fang Rock", the Rutans (eternal enemies of the Sontarans) mention that Earth is valuable because it is strategically placed, rather than anything on the planet. This explanation is as good as any until we get to the subject of all those other rocks that are pretty much in the same place but put up less of a fight.
- 1983's V, as well as the sequel miniseries The Final Battle and eventually The Series, had aliens not only intent on strip-mining the planet (of water), but considered humanity as a food resource (along with small birds and rodents). The Novelization makes a rather worthy attempt to justify it - it's not so much plain water and food they are after, but relatively pure water and meat; in their experience, all civilizations pollute their worlds irreversibly in the process of developing interstellar travel, and recycling technologies have trouble efficiently supporting millions, let alone billions of people. Starfaring civilizations are thus constantly warring over what little clean water and produce remains. When the "Visitors" discovered a life-sustaining world that had not yet developed even basic spaceflight... well, OM NOM NOM NOM.
- The Goa'uld from Stargate SG-1 already did it to Earth thousands of years ago—to acquire humans as slaves and hosts, as well as resource wealth—then subsequently lost control of the planet in a revolt.
- The Aschen are worse about this. They're strong enough to fight off the Goa'uld and often use it as a pretext to begin the covert process of turning populated worlds into giant farming fields with a fraction of the original population via the use of sterility viruses. This also serves to eliminate any potential competitor.
- The Wraith, in Stargate Atlantis, are constantly trying to get to Earth—because all the Hives are awake now, and the carefully-managed and tiny populations of humanoid life in the Pegasus galaxy are too scattered. A single world filled with six billion people, and hundreds if not thousands of other worlds also heavily populated with humans, Jaffa, and others, just makes it all the more appetizing.
- Emperor Gruumm from Power Rangers SPD. It's eventually revealed that his agenda is to use the resources of the planets he conquers to construct a new body for Omni, the true Big Bad.
- The Captain Kremmen radio show. The evil Thargoids raid other planets for their best brains, drain them for their knowledge, then destroy the planet.
- The Dark Eldar from Warhammer 40,000, who pillage planets for Human Resources, meaning, in this case, fleshy meatlings to play with.
- To a lesser extent, the regular Eldar before the fall. One codex mentions them doing things like stealing other species' suns for no discernible reason.
- The Combine in Half-Life 2 and its episodic sequels hijack worlds across dimensions rather than space, but the idea is the same. The native life-forms are used to construct bio-organic combat units, the most successful of which are exported to use on the next world; humanity seems to be in the process of becoming the new fodder units as the game opens. The physical material of the planet itself is also exploited: supplemental material explains the barren costal areas in the game are a result of the Combine teleporting away a fair fraction of the Earth's ocean water over the past decade, lowering global sea levels by several feet.
- Chairmen Drekk and his people, the Blarg, from Ratchet & Clank are stealing not only resources, but chunks of lithosphere from other planets to build a new one, in order to replace their polluted and overpopulated homeworld. Right before the Final Battle, Clank tries to convince him to stop his mad scheme, but Drekk's motives are different from what he suspects.
Clank: There must be a better way to find a home for your people.
- This was why the Strogg in Quake II and 4 invaded Earth. Like some of the other examples, they were seeking humans. As cyborgs, they wanted to convert humans into new Strogg... and additionally, they used them as food, and the raw materials for medical treatments to maintain their organic components.
- Prey's aliens have similar motivations. Life on Earth was actually seeded by them, and every few thousand years they come to the planet so they can abduct a few million humans to use as cybernetic biomatter source and extra energy.
- Rumor has it that in sequel Tommy would have been informed that the Keepers lied about seeding the galaxy with life.
- The Hierarchy from Universe at War: Earth Assault. Their predations of inhabited planets is mainly because they also require biomass, and because they are a warrior culture that regularly nips any sentient species that might challenge their supremacy in the bud before they can become a credible threat.
- The classic video game Defender. The resource was humans, the abduction of which allowed the enemy to create dangerous mutant ships.
- Dead Space flips this around mostly. Humanity has outstripped its ability to sustain itself, so they build Planet-Crackers; gigantic starships that tear planets apart in a multi-year process to provide raw materials for humanity. The resulting gravitational shifts wreak holy hell on the solar systems of the cracked planets. However, it appears that nobody can really complain about this as humanity hasn't run into any alien life. Until the events of the game, and they're really mutated human space zombies anyways. And we knew they were there.
- Super Robot Wars features a few of these among it's original villains: The Ze Balmary Empire of the Alpha series seeks to turn Earth's population into mind-slave soldiers, the Ruina in D looks to use humans as cattle, the Fury in J want to eradicate humanity and use the planet as their new home, while the Database in W take the Brainiac route.
- The Scrin from Command & Conquer seed planets with Tiberium, then wait for the spread of the material to drive the planet's inhabitants into extinction. Then they begin collecting up the Tiberium on the now dead world. Unfortunately for them, they didn't expect GDI and Nod to still be existant when they arrived on Earth. It was all according to Kane's plan.
- Although Lavos from Chrono Trigger is more of a Planet Eater, there are shades of this in Lucca's analysis during the final battle sequence, which suggests that it is collecting and analyzing the planet's evolutionary history in order to make itself more powerful.
- The Angel Cartel and Serpentis in EVE Online are interplanetary syndicates. They don't explicitly loot, just "protect". Also, the Amarr Empire used to organize slaver raids against Minmatar planets. In the Incursion Expansion Pack, Sansha's Nation restarts it's own "recruiting drive".
- Ecco the Dolphin kicks off with the title character's entire family being swallowed up by a typhoon that sucks everything from the sea and seafloor, including seashells and rocks. Ecco eventually discovers these storms are caused by a nightmarish alien species called the Vortex that uses Ecco's homeplanet as food source every 500 years, since they've lost their own ability to produce food.
- The Vasari from Sins of a Solar Empire have built their whole culture around this. They've been fleeing some threat for ten thousand years, stopping only to strip worlds of materials to build new ships and fuels for the next leg of their journey. The problem arises when they arrive in human space; they loot the both the uninhabitable planets and those colonized by humans.
- In Sword of the Stars, the Zuul use the resources of their worlds at an unsustainably high rate, called "overharvesting". While all races can do this, it is only compulsory for the Zuul. According to All There in the Manual, however, the Zuul's greatest pillaging goal is slaves: Zuul use other races' bodies for food and manual labour, and their minds for technological advance and other... Recreation.
- The Mycon of Star Control II are obsessed with this, buried as it is under their nonsensical Juffo-Wup ramblings due to their being rogue xenoforming Organic Technology, and always on the lookout for worlds to turn into blasted hellscape to their liking. It turns out they're the ones responsible for wiping out the Syreen homeworld.
- Inverted in Albion: You start out as a shuttle pilot on a giant strip-mining-colony ship from Earth that's on its way to extract all valuable raw materials from a planet that turns out to be inhabited...
- The Reapers in the Mass Effect universe do this, and they're of the "using humans/other sapient races as resources" variety. They convert many into mindless cybernetic horrors to fight their grounds wars; the rest are liquified into goo and used to build new Reapers.
- PS238 examines and lampshades this trope (along with Alien Invasion); Herschel explicitly points out that the only reason why any aliens would choose to invade a world would be if the planet contained something that can't be found anywhere else. Raw materials are far more efficiently gained by mining asteroids, planetoids, moons, and other celestial bodies without an atmosphere, high gravity and a local population. The Earth is invaded by a species of planet looters later, however: The aliens, for whatever reason, cannot breed on their own and unleash a bio-plague on the planet intended to rewrite all human DNA and turn all following generations of humans into their species.
- Subverted in The Inexplicable Adventures of Bob. Upon finally getting their ultimate weapon working on Earth, the Pirates of Ipecac are anxious to start pillaging.. and are nonplussed to realize Earth doesn't have much worth stealing. They decide to look around for something to swipe, and failing that, to just shoot the place up anyway (although Earth did have a resource they needed for their ultimate weapon: caramel).
- The rather smelly and fish-like Plutarkians from the 1993 Biker Mice From Mars series are a very fine example of this trope. Most of them were named after cheeses (e.g Lawrence Limburger, Lord Camembert, Napoleon Brie, Gutama Gouda). The Catatonians in the 2006 remake are almost as bad; they're after a new terraforming device invented by the mice so they can use it to turn Earth and other planets into new kitty litter boxes.
- In the old '80s version of the Transformers Generation 1, their energy source "energon" could be created by converting practically any source of energy, and was amazingly efficient. Yet the villainous Decepticons only tried to get it by stealing electricity from human energy plants and similar schemes.
- The Terrorcons in Transformers Energon were just as bad, draining entire planets dry of their natural Energon ore, often to the point of destabilizing them into an Earthshattering Kaboom.
- In the Marvel comics they can use any energy, Energon is just much better for them. The Decepticons, however, see this as "just oil." Makes sense, since all their Earth-based alt-modes run on oil-based fuels. Too bad their main base is made out of a nuclear power plant, which would have powered them better than oil, and yes the humans do point this out.
- The Invader Zim episode "Planet Jackers" takes this idea to the extreme, featuring aliens who steal entire planets, throwing them into their sun to keep it from dying. They specifically prefer planets full of "critters," because "critters burns good." Aliens who are loosely based on the crooks from Fargo, no less. And, since this is a Crapsack World where nobody thinks things through, don't bother wondering why they don't just use their planet-moving technology to move their own planet to another star.
- Brainiac in Superman: The Animated Series is a purely intellectual looter. He would examine planets for all their knowledge, and then destroy them and all inhabitants on them so he can be the sole holder of that knowledge. Of course, when Superman learns of this method of cornering the information market, he responds with an outraged "You're Insane!" and leaps into battle to stop the robot.
- Subverted like almost every other "Evil Alien Invader" trope in Futurama, where humans are the planet looters. They mined out one planet to the point of implosion, then refused to help the wildlife because of "Brannigan's Law"—a parody of Star Trek's Prime Directive which bans such "interference" (but apparently not the mining).
- Only one planet? It was used at least twice: one for Dark Matter, another for ice. Both imploded.
- I think the object they mined all the ice from was Halley's Comet; not sure if it imploded or not, but the trope remains.
- Only one planet? It was used at least twice: one for Dark Matter, another for ice. Both imploded.
- Futurama did this again, using a whole race of Braniac-like floating-brain aliens, dedicated to learning everything in the universe, turning all sentient life into morons, and then destroying it.
- An episode of Superfriends featured lion-like aliens who were plotting to chop the Earth into chunks, which would then be sold to various other races (all wanting different things, iron, water, etc.). Of course, the Super Friends have a little problem with this kind of entrepreneurship...
- An episode of Mighty Max features aliens who invade Earth to steal its toxic waste, which apparently they can use for beneficial methods. When Max eventually figures that out, he pretends to surrender and agrees that Earth will give them a periodic tribute, figuring that it makes no sense to fight over something humans don't even want anyway.
- "The Remarkable Fidgety River", an episode of Doctor Snuggles written by Douglas Adams, featured aliens stealing the Earth's water. They thought we didn't want the water, because we throw all our rubbish into it.
- Stephen Hawking believes that these would be the only aliens who would ever visit Earth.
- In a twist, humans themselves could be considered Planet Looters, Peak Oil and all.