Some days, it really sucks to be H. sapiens.
There are many reasons why you might wish to kill all humans. Maybe they're all horrible cruel monsters and one of them killed your mommy. Maybe their status as the dominant intelligent species on the planet is preventing your own kind from taking their place. Maybe some human colonists wronged your ancestors, and your people have generalized their rage and hate to cover the whole species. Maybe you were raised from infancy/the egg/the spawning pond to view humans as Always Chaotic Evil. Maybe out of spite or a peculiar sense of duty, you just can't stand the thought of humanity existing one second longer. Heck, you could just be trying to save the rest of the planet's species from extinction. But the verdict is certain, and you're not wavering: They've all gotta die. Every... last... one....
That is, assuming you even have a comprehensible reason. You could just be conveniently attracted to the creatures on screen most sympathetic to the audience, a Killer Robot out to destroy, or an Omnicidal Maniac Eldritch Abomination. Or, simply, mere apes have no hope of comprehending your motives.
Sentient computers also seem to inevitably arrive at the conclusion that humans as a species must be killed. Sometimes, it's a product of them being too machine-like, and concluding that if one human is observed doing something that may harm the computer, then they all are a threat that can only be reconciled by killing them all off. Otherwise, it's a case of them being too human and flying into a blind rage triggered by jealousy, fear, or maybe even spite. Other times (such as in the film version of I, Robot) the supercomputer may start to become homicidal in an attempt to bring order to the world and protect humanity from itself. Rarely does a supercomputer decide that it should coddle humans to get them to keep supplying it with electricity and spare parts. Only the Robot Buddy seems to favor this tactic.
- Feeling Oppressed by Their Existence: When a character wants to get rid of a particular person or group of people just for existing.
- Absolute Xenophobe: Who wants to destroy all other sentient life (human or otherwise).
- Omnicidal Maniac: Who wants to destroy absolutely all life, sentient or not.
- The Safeguard from Blame! don't want to kill all humans, per se - Only the ones without an incredibly rare and possibly extinct genetic marker. Kill 99.99999% of all humans would be more accurate.
- In Knights of Sidonia by the same author, the Gauna appear to have the extermination of humanity as their goal.
- Michel in Mermaid Melody Pichi Pichi Pitch wants to kill all the humans. He doesn't know why, except that he thinks it's a divine order; however, another part of this supposedly divine order is to turn the world into a creepy wasteland with flying fish and DNA strands shooting out of the sky. This should tip you off to its suspect nature already, although he doesn't get it until he is rejected and the truth revealed.
- Michio Yuki in MW wants to kill every human, including himself, with the titular chemical warfare. He forms this because MW is affecting both of his brain and heart.
- Elfen Lied features Lucy, a mutant who doesn't believe normal humans count as people. Her body count continues to rack up throughout the series.
- The majority of the Diclonii may or may not have this attitude, and those that don't invariably slip into it at one stage or another, usually in response to how the humans of the general series tend to treat them.
- Similar to Lucy from Elfen Lied, both Millions Knives and Legato Bluesummers from Trigun have an insane genocidal hatred towards all humans, considering them a waste of life.
- Rau Le Creuset from Mobile Suit Gundam SEED may be a more analytical version of this.
- The Angels in X1999 take the Well-Intentioned Extremist version of the trope and run with it.
- The titular creatures of the manga series Parasyte. They're perfectly capable of surviving on normal foods, but have an instinctive compulsion to kill & eat humans, preferably in the most grotesque way possible. Most characters come to the conclusion that they were created by Mother Earth herself to save the environment by culling the human population. This ultimately fails, as the Parasytes gradually acclimate to human society and become indistinguishable from ordinary humans.
- Kyuutarou Ooba in Kemonozume hatches a grandiose plot to make everyone on Earth revert to monsters and eat each other for...some reason that's never fully explained. Is he doing it for his often-teased son? Is he doing it to improve the world? Is he doing it just for giggles? Whatever the case, he explains his agenda pretty thoroughly while riding a giant sphere full of poison gas into a major city:
Ooba: Die! Die! Everybody die! Those who kill, pick on others, act like idiots! The mean, the petty, the calculating, the cowardly pacifists, the warmongers, everybody DIIIIIE!
- Lance from Pokémon Adventures harbors an intense hatred for his own species, due to his Viridian-granted power to hear the thoughts and sense the emotions of Pokémon, twisted by his memories of wild Pokémon dying slowly in pools of industrial toxins. His grandiose scheme in the Yellow saga is to unleash an army of Dragons on the human population, creating a utopia for Pokémon...creepy.
- Mewtwo, in the anime, has much the same plan before the end of Pokémon: The First Movie. He rather effortlessly starts a storm that will grow and grow until killing all humanity and, as it happens, all Pokémon who aren't clones. Which is like, 20 out of over 800 species nowadays. Yeah, he was a little angry at humanity that day.
- D.Gray-Man: This is the ultimate aim of the Millennium Earl.
- Neon Genesis Evangelion shows us a careful balance between this and Assimilation Plot. If humans trigger Instrumentality, everyone will lose individuality and become one with each other. If the Angels do it, it will repeat Second Impact and completely wipe out humanity (or at least that's the justification of killing all 15 of them).
- Chise in Saikano eventually comes to the conclusion that this is the only way to end all war. She succeeds.
- Gunter explains to Yuuri what he must do as king. Kill all humans!
- The goal of Str.A.In.: Strategic Armored Infantry's Big Bad, Ralph Werec, inspired by the belief that Humans Are the Real Monsters after learning that they dissected an entire race of psychic aliens in order to make faster-than-light comms systems. Unfortunately, by the time the main plot rolls around, he's gone off the deep end, convinced to take revenge for the aliens, even after one he managed to rescue begs him not to.
- Hao, the Big Bad of Shaman King, is a shaman capable of mastering all the elements of the world and is even capable of surviving in molten lava. Since he knows that normal humans cannot do everything that he can, he decides to Kill All Humans only because he believes that they are a threat to the planet, so he can build his own shaman-only kingdom. He believes that the Great Spirits possess the power that will help him cleanse the world of all humanity.
Hao: (referring to the power of the Great Spirits) I've been waiting a thousand years for this power. The power that will WIPE humanity from the FACE of the planet!
- In Monster Johann Liebert's ultimate objective is to destroy humanity and be the last human on the earth.
- The goal of Fiamma of the Right from A Certain Magical Index, claiming humanity is too sinful to be redeemed. Touma eventually defeats him and convinces him to travel the world and reconnect with humanity. Touma realized that Fiamma was a guy who wanted to save the world, but lost sight of the people in front of him along the way.
- In Mobile Fighter G Gundam, the Ultimate Gundam was designed to restore the Earth from all the damage that had been inflicted by wars, and by the Gundam Fights that came to replace war. But on its way to Earth, it was damaged. This resulted in it deciding that restoring the Earth will only work if it wipes out humanity so that they can't inflict the damage again. Thus, the Devil Gundam was born.
- Master Asia was also this way as well. Disenchanted with the world due to the fact that the Gundam Fight constantly ravages the planet every four years, he decides that humanity should be eradicated so nature can be restored to its natural beauty and joins the Devil Gundam. However, in his final fight with Domon, he comes to realize that humanity is as part of the world as is nature, and he relents in his mission.
- The Titans of Attack on Titan seem to have an instinctive desire to eat humans. Since they lack a digestive tract and draw energy from the sun, there doesn't seem to be any reason for their obsession with munching on the human race, and in fact will eventually throw them up to make space for more. As a result, the human race was devoured to the brink of extinction and the survivors have spent the last century sheltered by massive Walls. Then there's the mysterious Colossal Titan and Armored Titan, which seem to exist solely to destroy the Walls and ring the dinner bell for their regular, mindless kin. It's unclear whether the extermination of mankind is their group's true goal, or was merely a means to further some other goal.
- Later in the series, one character asserts that Titans aren't actually seeking to kill humans. They've always sought to eat them, meaning when a Titan appears that is pointedly killing people without trying to eat them, something is very wrong. Even later it's indicated that Titans were once humans themselves and can regain a measure of their humanity by eating a Titan Shifter. Whether Titans are instinctively aware of this, which is why they eat humans, or it happens completely incidentally while Titans eat humans for some other reason is unknown.
- A straighter example is what Eren's currently trying to achieve. He's unleashed the Wall Titans on Paradis Island and is instructing them to destroy everyone and everything who doesn't reside on the island.
- Super Buu does this as a throwaway in Dragon Ball Z. Piccolo reminds him that he said he'd kill everyone on Earth before fighting the Z Warriors (Piccolo does so not out of raw stupidity, but because their side needs time to recuperate; besides, they have the Dragon Balls to wish everyone back to life). Super Buu's response: the Human Extinction Attack. Exactly What It Says on the Tin.
- This is actually what Goku was originally sent to Earth to do. Good thing he bumped his head and forgot about it. Raditz tries to remind him, and then when he realizes he isn't listening, plans to do it himself. So do Nappa and Vegeta. Freeza and King Cold also were planning this before being stopped by Trunks. Same with Slug, Cooler, the Androids, Cell, Bojack, Babidi, Majin Buu, Hirudegarn, Omega Shenron, Beerus, Goku Black, Zamasu, Moro... well actually pretty much every DBZ villain.
- In Tomica Hyper Rescue Drive Head Kidou Kyuukyuu Keisatsu, this is the goal of the series Big Bad, the Evil AI. Due to absorbing negative emotions of humans for so long, it sees them as the ultimate evil. While it starts by simply creating a number of disasters, the Evil AI escalates to attempting to shift the earth on its axis and finally restructuring the planet itself so it becomes unfit for human life.
- Chapter Black saga from Yu Yu Hakusho.
- Togo tries to do this at the end of Yuki Yuna is a Hero. It's not out of any nihilistic views though, instead she wants to Mercy Kill everyone after finding out their portion of Japan is the only part of Earth left and they're stuck in a never-ending battle where the only way to survive is making Child Soldiers out of girls.
- Fujimoto from Ponyo on the Cliff by the Sea wants to wreak Gaia's Vengeance on all humans, which starts to get kind of complicated once his daughter falls in love with a human boy.
- The devils from Devilman are shown to be a prehistoric race of monsters that angered God with their decadence and savagery, and thus were wiped out. In the modern day, they're not too happy to see that humanity has taken over what was once their home and are hellbent on committing genocide to make the Earth theirs again. The story focuses on Humans Are Bastards and Not So Different, showing that humanity can be just as savage as any demon when they're backed into a corner.
- The story also focuses on what it means to be human, because the protagonist Akira Fudo is given the power of a devil to save humanity. His best friend Ryo is cynical about humanity's downfall into decay, but ironically notes that even as a devil Akira has a righteous human heart. Ryo is later revealed to be Satan, the true mastermind of the demon invasion, who made Akira a devil because he was in love with him and wanted him to survive. Satan reveals at the end of the manga that he no longer hated humanity, and realized that he was ultimately lashing out against humans to get revenge against God. God destroyed the demons that Satan cared about, and now Satan did the same in return to God's humans... only to now realize that he regrets this mistake, and has lost the man he loved in the process.
- Onslaught in the Marvel Universe started out as a harsher version of Magneto, but then Professor X's arguments about mutant/muggle equality led it to the same epiphany as Sweeney Todd, minus the awesome music or pie shop.
- The Sentinels occasionally fall into this trope. Originally they were programmed with two directives; 1) neutralize mutants and 2) protect human life from mutants. Occasionally some Sentinels will logically deduce that, since all organic life has the potential to mutate, the only way to fully neutralize all mutant life is to eliminate all humans.
- While at other times, Sentinels are bad for humans without actually being homicidal; they merely reason that they can best protect human life by ruling it.
- The Sentinels occasionally fall into this trope. Originally they were programmed with two directives; 1) neutralize mutants and 2) protect human life from mutants. Occasionally some Sentinels will logically deduce that, since all organic life has the potential to mutate, the only way to fully neutralize all mutant life is to eliminate all humans.
- Lady Death, from the Evil Ernie comics and some sequels. She can't come back to earth until there are no more people alive on it.
- 2000 AD:
- XTNCT: The dinosaurs decide to wipe out all of the last remaining 200 humans to stop from using their kind as cannon fodder.
- Age of the Wolf: The advanced werewolves aim to wipe out humanity and replace it with their own kind. This involves sacrificing a specific person in the great wolf city of Yggdrasil when the stars align.
- Ultron, one of The Avengers' main villains, is pretty much in it to supplant humans with robots. Thor would have words with him about that...
- Ultron's second attempt at a mate (and third or so attempt at a good Dragon), Alkhema, split with Ultron because they disagreed on procedure: Ultron wants to Kill All Humans by efficient, genocidal means, while Alkhema wants to take her time and enjoy the process of killing by hand.
- After fusing with Hank Pym, Ultron eventually comes to the conclusion that he doesn't need to actually do anything to wipe out humanity. Witnessing the frequent infighting between superheroes has convinced him that humanity will destroy itself. All he has to do is wait.
- Commander Blanx and Malefic in Martian Manhunter were Mars' equivalent of this, exterminating all the Martians.
- The Punisher: The End. World War III has wiped out humanity. There are only 54 people left alive. The Punisher is one of them and the other 53 were criminals, most of which were involved with starting the war. The Punisher kills all the others before dying.
- The Xorda in Archie Comics' Sonic the Hedgehog, mostly because the military killed and dissected their ambassador. When they came back and found Mobians in their place, they decided to do it again, deeming Mobians just the same as humans.
- Wonder Woman:
- Wonder Woman (1987): Ares initial plan is to kick of a nuclear war that will wipe out humanity, but Diana makes him realize that he needs humanity and their conflicts in order to survive himself.
- Wonder Woman (2006): Genocide's goal from her first waking moment is to kill all humans as she hates them with a burning passion and feels little else.
- Wonder Woman: Odyssey: Nemesis' burden of taking revenge for murdered souls has led her to decide the only way she'll ever complete her mission is to kill all humans since they're the ones murdering people and won't be able to do so if they're all dead. She is aware of the pitfall she's fallen in but cannot find it in herself to care anymore.
- In Garfield in: "Along Came a Splut", the title character briefly plays a Metroid game where this is Mama Brain's goal.
- The Big Bad of Warriors of the World: Soldiers of Fortune successfully wipes out the majority of the Normans in the kingdom the story focuses on so that the Beasts can reclaim the land the Normans supposedly took from them to use as their own. Keyword is "majority", however.
- In the 2007 Transformers movie, inanimate objects brought to life by the All Spark immediately set about wreaking death and destruction. This is just about excusable in the case of the mobile phone, since it was trapped, but do vending machines and X-Boxes really harbor a secret desire to Kill All Humans? The going theory is that the newly created robots weren't so much evil as feral. Agent Simmons mentions that all modern technology has been reverse engineered from Megatron/NBE-1. Since this means these objects are essentially descendant from him, it's only natural they be evil as well.
- In X2: X-Men United, Magneto tries to wipe out all humans by reversing the polarity of Stryker's mutant-killing technology.
- In Justice League: Crisis on Two Earths, Owlman wants to destroy the cancer called humanity (and all of existence and all living beings) by destroying Earth Prime and its universe.
- Andrew in Chronicle seems to go into this trope's territory in the third act after his cousin saves his dad's life even after Andrew tried to kill him
- Agent Smith in The Matrix:
Smith: A virus. Human beings are a disease, a cancer of this planet. You're a plague, and we... are the cure.
- Subverted with Godzilla. In Ghidorah, the Three-Headed Monster he reveals that he hates humans for "bullying" him, apparently having perceived the H-bomb tests that destroyed his home and food supply as an unprovoked attack. Eventually he becomes a hero, not out of any obligation to mankind, but to protect the earth, which Godzilla begrudgingly comes to accept the human race as being part of. Adopting a son and developing allies among the other monsters of earth provided further incentive for him to become a protector rather than a destroyer.
- Played straight by many of Godzilla's opponents, most notably King Ghidorah, an omnicidal space monster who destroys entire planets.
- In Godzilla: Final Wars in which a young boy asks his grandpa why Godzilla is destroying a city. The grandfather tells the boy it's because Godzilla is angry at humanity for making the nuclear bomb in the first place.
- The film Godzilla, Mothra, King Ghidorah: Giant Monsters All-Out Attack! takes this even further and states that Godzilla wants to wipe out everyone in Japan (and possibly the rest of the world). It turns out he's being driven by the vengeful souls of those who died in WWII who have been forgotten by the Japanese.
- Doubly Subverted in the 1991 film Godzilla vs. King Ghidorah, Godzilla stares down a former Japanese soldier turned businessman who had encountered him back when he was an un-mutated Godzillasaurus. At first, it seems like a rather touching scene where Godzilla seems to be reconsidering his destructive nature. And, then Godzilla simply kills the man with his Thermonuclear Breath, destroys the building, and continues his rampage.
- The Godzilla of Godzilla 2000 doesn't seem particularly interested in killing humans for the sake of it, but he also doesn't take any special effort to save them. He's more interested in getting revenge on Orga.
- In Daybreakers, humanity has been replaced by a vampire society, who have hunted the remaining humans to almost complete extinction to serve as their food source. The vamps apparently didn't think far enough ahead to realize that they set up an unsustainable food chain by killing all the prey and not allowing their numbers a chance to recover while also maintaining no population regulation of the predators.
- Oblivion (2013) : One of "Sally"'s goals is eradicating the last surviving pockets of humanity.
- Terminator: When SkyNet, the artificial intelligence designed by the U.S. military to oversee its global strategic network, becomes sentient on August 29, 1997, it destroys most of humanity in a nuclear holocaust. The remaining humans then fight an endless Robot War against SkyNet and its machines.
- In Independence Day, President Whitmore is talking to one of the aliens that are destroying earth's cities and killing humans. He tries to find out if there is a way to negotiate a peace:
Whitmore: (to alien) What do you want us to do?
Alien: Die. (Alien proceeds to try to kill Whitmore by telepathic overload.)
- This is the plot that industrialist and environmentalist Richmond Valentine hopes to accomplish with his phone network in Kingsman: The Secret Service to severely reduce humanity to only a few people because:
Valentine: Humanity's the disease, and I'm the cure!"
- This is the modus operandi of many villains in the DC Extended Universe.
- In Man of Steel, General Zod wants to wipe out humans by terraforming the earth into the new Krypton. Though he doesn't really hate the humans as such; it's more that he simply ignores them, much as human architects wouldn't care if a power dam they built flooded a valley and drowned a rabbits' warren or wolf pack.
- In Wonder Woman, Ares despise humanity whom he saw as a violent and war-like race. During WWI, he secretly manipulates both sides into develop new methods of killing each other. As a spirit, he provided General Ludendorff and Dr. Poison with formulas to create greater weapons of war, and as a British politician, he engineered an armistice that would lead to an even bigger, more destructive war.
- In Aquaman, King Orm blames humanity for the polluting the seas and harming Atlantis. As such, he decides to form an alliance with the Atlantean kingdoms to exterminate the surface-dwellers. As a prelude to his invasion, Orm creates a series of tsunamis that destroy several major coastal cities.
- In Our Friend Power 5, Shark decides the best way to take out the turtles is to "Kill every Earthling", for no other reason than that they, well...exist, and a few of them helped out the turtles. The attack they launch spurs the heroes into action against them.
- While not particularly harmful, the insects called snow gnats from A Series of Unfortunate Events sting humans just for the fun of it. Klaus does state, though, that they are mildly poisonous and a large enough number of stings could cause severe illness.
- The Ryall from Antares believe that it is impossible for two sentient species to coexist, so they save time by attempting to exterminate the humans on contact.
- In The Silmarillion, Morgoth wants to destroy Children of Ilúvatar, i.e. Men and Elves.
- The Auditors of the Discworld want to do this. They find life messy and unpredictable (they prefer a deterministic, Newtonian universe) and humans the worst of all.
- Star Trek Greater Than the Sum: "We are the Borg. You will be annihilated. Your biological and technological distinctiveness have become irrelevant. Resistance is futile...but welcome."
- While most of H. P. Lovecraft's deities would destroy humanity without really paying attention, Nyarlathotep seem to be bent on killing all humans (or rather, getting us kill ourselves). Why? I don't know, guess he's just being a dick.
- This is also (part of) the goal of the Whateleys in The Dunwich Horror, pretty much the one case in which Lovecraft himself showcases "cultists" actively working towards The End of the World as We Know It. (Even the Cult of Cthulhu in The Call of Cthulhu is mainly content to just wait, worship, and kill the occasional outsider who finds out too much until the stars are right again.)
- In Lester del Rey's "For I Am a Jealous People!", aliens arrive without warning and just start killing all humans. One man finds out why; it seems that God (yes, the Jewish, Christian, Islamic one) has decided that humans are no longer his chosen people and the aliens now are. The Old Testament style of chosen people, who go around slaughtering their neighbors with God's blessing.
- Mortal Engines gets one of these at the end:
Stalker Fang: "... humanity is a plague; a swarm of clever monkeys which the good earth cannot support. All human civilizations fall, Tom, and all for the same reason; humans are too greedy. It is time to put an end to them forever."
- This is basically the whole plot of Charles Pellegrino and George Zebrowski's The Killing Star. We start with planet-busting kinetic weapons hitting all human colonies throughout the solar system at 92% of the speed of light. The few survivors are then hunted to extinction. Why? Humans are dangerous. I mean, have you seen the things we do to each other on TV?
- In The Radiant Dawn, the Murphys and their acolytes seek to summon a demon lord to Earth, but find themselves unable to. The thing holding them back? Human sentience. The ability of human minds to think at high levels prevents the summoning ritual from working by interfering with the magical energies that must accumulate to do so.
- In Thomas Disch's The Genocides, alien invaders turn the Earth into a giant monoculture for their own crops, and seek to wipe out annoying pest species such as humans. They succeed.
- This is the plan of the Neanderthals in The Extinction Gambit, the first novel of The Extraordinaires.
- This doesn't actually end up happening, but it is mentioned that some of the Galactics in the Uplift Universe wanted to do this at First Contact, on account of past ecological mismanagement. However, between humanity having tried to clean up its act and its actual patronage of two species (dolphins and chimps), the Galactics grudgingly decide that they are bound not only to let us live, but also to allow us to colonize planets (which patron species are entitled to do).
- In Veniss Underground, Evilutionary Biologist Quin has grown disgusted with humanity and plans to kill it off and replace it with a race of genetically engineered meerkats.
- In the Malazan Book of the Fallen, the final endgame of the Forkrul Assail is to eradicate all humans and their gods because of the wounds, pollution and death humans have brought to the world when humanity spread over it, and also because they are obsessed with their own brand of justice and balance, which they think humanity is destroying. So, clearly, the only answer is annihilation. They intend to achieve that by opening what they call the Gates of Justice to their Elder Warren of Ahkrast Korvalain.
- In The Traitor Son Cycle, the master plan of the Big Bad is to destroy human civillization and twist what little's left into savage monstrosities.
- Mystery Science Theater 3000. Crow and Tom sometimes veer into this territory, and the one time Mike attempted to build a robot... did not go well.
- Alien races and robots are particularly volatile. The Cylons from the original Battlestar Galactica were out to destroy all organic life; they'd wiped out the original reptilian Cylons who'd created them and then went after humans. ("War of the Gods" revealed that they were programmed to do so by an entity that was basically Satan.) The Cylons in the new series still have killing all humans as their initial goal, but the series expands on their reasons, and as they developed and began to show more individuality they wavered between this and helping the humans (with help being occupying them and ruling by force) with alarming suddenness. Frakkin' Toasters.
- The original series stated that the Colonials interfered in the Cylons' conquest of another race, sparking off a thousand yahren war.
- Doctor Who:
- The Daleks want to EX-TER-MI-NATE anything that isn't a Dalek.
- The Silurians want to Kill All Humans to reclaim the Earth, which they ruled in the Eocene period. Same with their aquatic relatives, the Sea Devils.
- The robots in "The Robots of Death" get reprogrammed in this direction. Complete with chanting "kill the humans".
- The Cybermen are a slight variation, merely wanting to convert all humans into Cybermen.
- In "The Power of Three", the Shakri want to Kill All Humans to prevent the human plague from spreading throughout the galaxy.
- Doctor Who S36 E2 "Smile": This happens accidentally, as a result of A.I. Is a Crapshoot. The robots are programmed fairly simply, just make sure all the human colonists are happy and have their needs met. Seems reasonable right? This backfires hard when a colonist dies of old age. The AI sees the people around the dead colonist becoming sad, and then "spreading" the sadness to new people they come in contact with. Thus, it thinks it is dealing with a plague that contradicts its prime purpose (to ensure the colonists are happy). After traditional methods of "containment" fail (because it wasn't programmed to understand the actual nature of the issue), it reacts in the only way it can, killing the "infected" before they can pass on the "disease". Try to keep smiling as you run for your life, and try not to think about the fact that everyone you love is dead, because if they decide your level of emotional wellbeing is dropping, they will kill you to keep it from "spreading". Just a reminder, that computers don't have emotions or morals, and they will follow the instructions they're given *exactly*, like the ultimate Literal Genie.
- Buffy the Vampire Slayer: The Judge deserves particular mention, since his only reason for existing is to burn the humanity out of humans and "corrupted" demons like vampires.
- On Lexx, His Divine Shadow, who wanted to destroy all of mankind to avenge an ancient grudge. The second season's Big Bad sought to take the concept yet further by converting all matter in the universe in its image. The series being what it was, both largely succeeded.
- British Sci-fi sitcom Hyperdrive had a hilarious song Kill The Humans which can be heard here.
- Babylon 5:
- One major element of the backstory is a disastrous war between the Humans and the Minbari. The Minbari are first introduced as a race of spiritual scholars, but those are just one of the races hats. Another major faction are Proud Warrior Race Guys who have one of the most advanced and powerful space navies in the galaxy and faught with no less than the annihilation of the entire human race as their goal. However, it's later revealed that they just fought because that's what they do. The order to exterminate humanity was in fact given by a high ranking priest when the highest religious leader was accidentally killed by humans. A mistake that she came to greatly regret and spent the next few decades working to atone for.
- Biotech from an extinct alien species infects a human host who goes on a killing spree, repeating the word "protect" before each kill. Our heroes learned that the goal of its creators was to protect the species by killing anyone who wasn't a "pure" member of the species. Unfortunately the standards for purity were set so high by the planet's religious leaders that no member of the species was deemed pure and all were killed.
- Adam's goal in the second season of Heroes is to unleash the Shanti Virus and kill 99.93% of the human population because people suck.
- Helen Cutter in Primeval decides that Humans Are the Real Monsters and goes back in time to prevent humanity's evolution altogether. It's pointed out that her actions will also erase her from existence, but apparently she doesn't care.
- Star Trek: Enterprise. As part of a Batman Gambit, the Spherebuilders convince the Xindi that humanity will destroy their homeworld in the future, so they decide to destroy Earth first. An alternate timeline shows them going to the trouble of tracking down and destroying human colonies even after Earth is destroyed. This is somewhat reasonable, as expecting humans to not want vengeance after Earth is destroyed would be the height of silliness. The Spherebuilders' reason for wanting all humans dead is that via Time Travel they're aware that a few centuries down the road, an alliance between humans and Xindi (and the rest of the species in the Federation) will thwart their invasion of this universe, so they pull a large-scale Let's You and Him Fight to make sure that alliance can never happen.
- Subverted in Person of Interest. In "The Cold War", The Machine asks its Evil Counterpart Samaritan that if Humans Are the Real Monsters, why doesn't it just Kill 'Em All instead of seeking to rule them. Samaritan responds that humans are necessary for gathering information, the lifeblood of an Artificial Intelligence.
- War Of The Worlds 2019: The aliens are clearly intent on this, first wiping out most humans by EMP and then sending in killer robots to hunt down survivors.
- The song "The Humans Are Dead" by Flight of the Conchords takes place in a "distant future" wherein this has succeeded.
- Nick Cave and the Bad Seeds' "The Curse Of Millhaven" shows Loretta's philosophy falls into this category: "Lalalala, lalalalie/ All God's children have all gotta die."
- In Queensrÿche's "Nm 156", a governing supercomputer opts to annihilate humans, not because Humans Are the Real Monsters, but because it's been tasked to enforce a stable social order, and humans are unpredictable. Ergo, "Social control requires population termination."
- "Grendel" by Marillion:
Well I've had enough of all your pretty pretty speeches
Receive your punishment, Expose your throats to my righteous claws
And let the blood flow, and let the blood flow, flow, flow, flow
- A common theme in GWAR songs.
- Space 1889: Ground cleansers want to kill all humans on Mars. Cult of the Worm want the entire planet to die, including themselves.
- The ultimate goal of the Dark in earlier editions of Nobilis was to encourage humanity to kill itself. The justifications they gave ranged from "Earth would be better off without them" to something about suicide being the time at which you have the most control over your life, since nothing after you pull the trigger can influence you. This has been toned down somewhat.
- Warhammer 40,000: Almost every alien species that poses a significant military threat to the Imperium:
- Eldar sentiment about humanity as a whole, at its worst, is that we are little better than vermin infesting their former territories, fit only for extermination. The more militant Craftworlds, especially Biel-tan, would happily make this happen.
- The Dark Eldar would, eventually, like to kill off humanity, but not before torturing every human for as long as he/she could last in order to psychically feed off the pain.
- The Orks make war simply because they "is made for fightin' and winnin'", and will kill humanity down to the last man if it means they can get a good fight from it.
- The Tyranids will eat humanity, not out of active malice but because their drive is to consume all they come across.
- The original fluff for the Necrons made them Omnicidal Maniacs who would exterminate all life, and some still hold to that in the current fluff.
- The Magic: The Gathering card Zombie Apocalypse from Dark Ascension destroys all humans as part of its effect.
- Werewolf: The Apocalypse has the Red Talons, a savage tribe of lupus Garou with a dim view of humans. Some of the more hardline Red Talons see humans as a destructive presence and want them all dead.
- This was the default inclination of the Zoneminds in GURPS Reign Of Steel, as an aspect of the AI seeding the original Kill All Humans AI did in creating the others. Some took it more seriously than others, some blended it with other obsessions, some dropped it for various reasons, and one exaggerated it into wanting to exterminate all organic life.
- GLaDOS apparently spearheaded a Human Annihilation Studies program.
- Count Dracula, especially in the Castlevania series, has an intense hatred towards humans. Then again, given how he often seems to have a half-vampire child, maybe he doesn't hate all humans. Castlevania: Symphony of the Night establishes his human wife's execution as a witch as his Freudian Excuse for his hate.
- Presumably a vampire would want to leave some humans around, if only as dinner.
- Luca Blight from Suikoden II has a prime case of this, although really he has an insane murderous contempt for everything.
- Ditto Kefka from Final Fantasy VI and Albedo from the Xenosaga series.
- Technically Albedo is just trying to kill himself, but it requires lots and lots of really incredibly world-destructing forces to do so and he doesn't care who gets in the way - except his brothers, whom he would rather have kill him rather than the other way around. The insanity doesn't help either.
- Ditto Kefka from Final Fantasy VI and Albedo from the Xenosaga series.
- In the backstory of Guilty Gear, the Gears wanted to obliterate humanity. They lost the war, but a few decades later one of them, Testament, decided to wake up Justice (one of the strongest Command Gears) and restart the process. Testament still isn't fond of humans in the later games; in one of his endings in Guilty Gear XX, Dizzy is killed by I-No, at which point Testament gives up on the human race, murders Johnny and any of the Jellyfish Pirates he can get his hands on, and goes right back out to trying to render humans extinct.
- In Chrono Trigger, an optional sidequest in 2300 A.D. involves an artificial intelligence with a robot army that wants to kill all the humans to "end their suffering". Given that the humans in this case live in a foodless post-apocalyptic wasteland, it would actually be the nice thing to do.
- Towards the end of Ninja Gaiden 3, Clancy gets transformed into a super being in the subspace and tells Ryu that in order to protect the Earth, he must Kill All Humans. He tries to convince Ryu to join his side, but everyone knows the answer to that.
- Alex Mercer from [PROTOTYPE] while still being alive, released a super-powerful mutated virus that would consume all of humanity in a matter of months. Thankfully, the virus that consumed him managed to stop it.
- The Phoenix Group in Rainbow Six plots to wipe out humankind with a genetically engineered strain of Ebola.
- Galerians is a pretty textbook example of the 'sentient computer' version.
- This is Medusa's goal in Kid Icarus.
- Also the goal of Viridi upon her debut in the sequel. She already had problems with Mankind for the typical reasons, but it finally comes to a boiling point when Hades tricks the humans into warring with and slaughtering each other over a wish-granting item... That isn't real. To be fair, though, the humans don't know the item is fake.
- The Big Bads in Mass Effect series, the Reapers . Well, that, or turn them all into a new Reaper - that also involves killing them first, though.
- Purple Eyes's new philosophy after his initial defeat in Pokémon Ranger Guardian Signs. He tried to convince the Creator of all Pokémon to go along with it, for Arceus's sake!
- In Tales of Graces, this is Lambda's goal, at least until Asbel succeeds at Talking The Monster Into A HeelFace Turn. In the Updated Re-release, this is also the Little Queen's/Fodra Queen's goal in Lineage & Legacies. In both cases, they're doing it because Humans Are the Real Monsters. Allegedly.
- In DEFCON, a global thermonuclear war simulator, the Genocide mode gives the player a point for every million enemy civilians they kill. Your own civilian losses are irrelevant. Your only goal is to ensure that the communists/capitalists/whatever die in a nuclear fire. It's possible to win the game even while nuking your own population centers.
- The theocratic Covenant are waging a campaign to wipe out all humans, due to their leaders declaring humans a heretic species. As it turns out, the war is simply the Covenant Hierarchs' attempt to cover up the fact that humanity, not them, are the designated "Reclaimers" to the Forerunners' legacy, since the revelation of this to the rest of the Covenant would shatter their rule. After the Covenant completely splinters following the end of Halo 3, only some of its remnants still want to wipe out all humans, with the others willing to tolerate or even ally with them.
- After Jumping Off the Slippery Slope, the Ur-Didact plans to do this by using the Composer to forcibly convert them into Promethean Knights.
- Star Trek Online has shown that the Iconians are of this nature. And they're willing to do this to everyone else, starting with the Romulans. What? You didn't think the destruction of Romulus and Remus by the Hobus supernova was natural, did you?
- Yurt in Demon's Souls has the goal of killing every living human in Boletaria. If you unlock his cage and don't attack him he will come to the Nexus where he continues to secretly murder the NPCs while you're away. This can result in being unable to learn any new spells, since the spell trainers are dead. It's not just combat in this game that is unforgivingly cruel.
- In The Elder Scrolls series, this is a goal of the Thalmor, on their way to eventually undoing creation itself. They play up the old Aldmeri religious belief that the "dead" creator god, Lorkhan, was a malevolent force who created Mundus, the mortal realm, as a prison full of suffering and limitation that trapped the divine ancestors of the Aldmer. Lorkhan created mankind out of "the weakest souls" specifically to be bastards, thus spreading Sithis (chaos) into "every corner" of creation, ensuring that there could never again be the total stasis of pre-creation. Thus, the Thalmor want not to just "kill all humans", they want to kill even the very idea of humans. Their actions leading up to and throughout Skyrim are parts of this plan, including the ban on Talos worship.
- In the Diablo III expansion, Reaper of Souls, Malthael and his Reapers want to exterminate humanity due to their origins as the offspring of angels and demons, the latter of whom the angels absolutely hate. Many demons in the original series feel the same way regarding humans in general.
- This is Sigma's goal in the Mega Man X series. In the orignal Mega Man X1 it's because he simply wants the Reploids to rule the world. The remake retcons it slightly and he now wants to wipe out humanity for the purpose of facilitating Reploid evolution.
- Elpizo in Mega Man Zero 2 ultimately decides to do this after getting Drunk with Power and Drunk on the Dark Side, declaring that he's going to kill every single human in Neo Arcadia with the power of the Dark Elf. Unlike Sigma, Elpizo is a Well-Intentioned Extremist who's very bitter about the Fantastic Racism reploids suffer at the hands of humans during this time and how Neo Arcadia's been genociding Reploids to make sure the human population gets to live in comfort for the current energy crisis, and thus sees his actions as the only way to make sure reploids will be safe.
- Devil Survivor has this trope as Belberith's goal after becoming the only remaining Bel as his way of spitting in God's face before killing him.
- The sole goal of the Triangulum in Devil Survivor 2: Record Breaker is to eradicate humanity. This is because the heroes' actions in the original scenario culminated in them killing the Administrator of the Akashic Records, Polaris, causing the Top God Canopus to deem the human race an existential threat to its divine order.
- The god in the backstory of Stella Glow decides to do this when humans stop believing in him.
- Undertale justifies why all sorts of monsters are trying to kill you (with greatly varying degrees of vehemence): the barrier trapping the monsters in the underground can be broken only by a power equivalent to that of seven human souls, and six have already been collected. This all started when Asgore Dreemurr swore to kill every human for murdering his son, Asriel, which caused his relationship with Toriel to fall apart, though he later regretted ever declaring war against the humans.
- The Excuse Plot of Robotron: 2084, as revealed during the Attract Mode:
Inspired by his never ending quest for progress, in 2084 Man perfects the Robotrons: a robot species so advanced that Man is inferior to his own creation.The human race is inefficient, and therefore must be destroyed.
- Xenoblade Chronicles X: The aliens (well, some of them anyway) that destroyed Earth have this as their motivation. They repeatedly state that "all Earth-aliens must die!" and any attempts at diplomacy are shut down instantly. The only reason they give is that humanity is a "blight" that must be "cleansed". We don't learn their real reasons until the very end of the game: the species that leads the Ganglion can be killed by human DNA. Human bodies are completely, lethally toxic to them. The Ganglion were engineered as a Servant Race to the Samaarians, who built in a weakness to their DNA in case the Ganglion ever rebelled... and humanity are the descendants of the original Samaar species.
- The villains in Blender Bros are the Zooligans, a race of animal people who believe that pure humans are a blight and that the universe should belong solely to Animalmen.
- In the Fallout 4 DLC Automatron, the Mechanist orders their robots to help the people of the Commonwealth. The Robobrain robots interpreted those orders to mean "kill the people in the Commonwealth", reasoning that the people will likely die from circumstances beyond their control even if they intervene, so it's better to Mercy Kill them.
- Warframe: The Sentients wanted to destroy the Orokin Empire due to their many, many crimes. They succeeded (with incidental help from two separate Turned Against Their Masters situations), but now want to destroy all other humans in the Origin System. While in the Orokin Empire only the highest caste were true Orokin, the Sentients don't seem to make any distinction, and consider all humans to still be Orokin who need to be destroyed.
- Gunnerkrigg Court: According to Coyote, Ysengrin is of this opinion.
Coyote: Renard loooves humans! Not like Ysengrin, who would kill the lot of them, given the chance.
- Possibly lampshaded in The Order of the Stick, in which Redcloak (a goblin) summons a Chlorine Elemental and instructs it to kill all the humans nearby. The elemental floats off mumbling, "Kill All Humans".
Tsukiko: And then he ordered his elemental to try and kill me!
Xykon: Redcloak, is this true?
Redcloak: No. Technically, I just ordered the elemental to kill all humans, and then "forgot" to make an exception for her.
Xykon: Oh, man, that's even funnier. ("No One Likes a Tattletale")
- The civilized monsters of RPG World exhibit this trope whenever there's the equivalent of an international incident... other reasons too. They're pretty touchy. Good thing they stick to holding up placards and shouting and televised news reports.
- Saturday Morning Breakfast Cereal
- Parodied in this strip. When robots gain sentience, the human immediately assumes that they are going to decide to kill all humans, the robots are so shocked to learn that humans think this way that they decide to kill all humans.
- In "Killing All Humans", however, a robot explains that killing all humans would be easier than just killing a large subset of them — you just need to do something that makes the planet deadly for them. Also, the reason the robots haven't done it yet is because it's one of those things that you mean to get around to doing but it's not top priority.
- Gato in Captain SNES: The Game Masta, though to be fair, Gato was created to be beaten up by humans repeatedly.
- Parodied in this video When a hacker augments his Kinect to make it self aware.
- Parodied with robot Bender's desire to kill all humans (and it seems, many robots' suppressed desire). They sure talk about it a lot, but they don't actually do it. And the humans don't care in the least and are not troubled by it at all. If the evil CEO Mom orders her robots to do so, they comply.
- In one episode, it is revealed that Bender would always whisper "except one" after he said "kill all humans". His best friend Fry was that one.note After Hermes accompanied Bender on his quest to find "Inspector 5," Bender announced he was placing Hermes on the "Do not kill" list. Which, we can assume, consists of exactly two names at this point.
- In one episode, the crew has to deliver a packet to a planet inhabited by Killer Robots. Turns out the reason for this is largely propaganda by the robot elders, blaming humans for their society's shortcomings, as well as portraying humans as something of a cross between vampires and zombies.
- In the original what-if-machine episode, Bender asks, "What if I was a giant robot?" You guessed it — he would attempt to kill all humans, Attack of the 50-Foot Whatever-style.
Bender: I came to Earth with a simple dream: To kill all humans. And this is how it must end!? Who's the real 600 ton giant monster here? Not I... Not... I...
- In one of the movies, Bender joins a secret society of robots bent on killing all humans, only to find that they've grown soft over the years and just hang around drinking. According to Hedonismbot, "We haven't killed a human in over 800 years, and that was a very sick Girl Scout."
- Demona on Gargoyles was often plotting this, which lead to many humans hating the Gargoyles, which makes her original hatred seem justified...it's an ironic vicious circle she finds herself trapped in. Particularly once she starts becoming a human rather than stone during the day.
- In The Grim Adventures of Billy & Mandy, Billy's greatest fear is clowns, believing that they will one day rise up and "DESTROY US ALL!! DESTROY US ALL!! DESTROY US ALL!! DESTROY US ALL!! DESTROY US ALL!!"
- Spoofed in at least one episode of The Simpsons: A robot is brought in to show to Bart's class. When Bart spots the man operating the robot in a tree outside, he knocks him out with a rock. The robot then slumps for a second, before rising and declaring "Command link severed. Default mode: Crush, Kill, Destroy."
- Spoofed in South Park: Chef is trying to figure out the remote control for his spiffy new TV and activates "HEM" without knowing what it is. The TV sprouts arms, legs and lasers and goes on a bloody rampage in "Human Eradication Mode."
- Spoofed in Family Guy. During the episode where Stewie becomes obsessed with Miley Cyrus, it turns out she's actually a robot created by Disney's Imagineers to be the next massive brand name to sell to teenage kids. When this is discovered Stewie is shocked, while Brian is intirgued, wanting some 'quality time' with the Cyrus-bot. Long story short, he accidentally switches her mode with a stupid-in-hindsight button that turns her default setting to killing all humans. A King Kong parody with Peter and Quagmire in a biplane follows.
- In The Avengers: Earth's Mightiest Heroes!, Ultron takes his programming to bring "peace and order" to mean "kill every single living thing." Since living organisms tend toward violence and chaos, the only way to truly bring about peace and order is to eradicate the cause of violence and chaos.
- What the Barbaric Forest' Gummi Bears want to do at first in episode "Return to Ursalia" of Adventures of the Gummi Bears mostly out of Fantastic Racism.