History Main / RoboticPsychopath

* In the VisualNovel ''VisualNovel/BionicHeart'', Tanya goes on a killing spree after she realizes that she was given [[spoiler:the brain of a serial killer]] when the resident MegaCorp illegally created her and other {{Artificial Human}}s from preserved brains in PeopleJars.

* In ''Videogame/Borderlands3'', [=FL4K=]'s backstory is that they were once an indexing robot who [[InstantAIJustAddWater one day suddenly became self-aware]] as well as developing a "thirst for murder".

--> ''"... [And then] Kyne granted Perrif another symbol, a diamond soaked red with the blood of elves, [whose] facets could [un-sector and form] into a man whose every angle could cut her jailers and a name: PELIN-EL [which is] "The Star-Made Knight" [and he] was arrayed in armor [from the future time]. And he walked into the jungles of Cyrod already killing, Morihaus stamping at his side froth-bloody and bellowing from excitement because the Pelinal was come..."''
* In ''VideoGame/{{Evolve}}'' [=DemonCore=]!Emet is one of these, as well as the death commando droids that his logic core came from. How well he can actualize his desire for murder is impaired by his chassis and lack of human opponents, but his personality is one of pure sustained murderous rage.
* ''VideoGame/{{Fallout 4}}'':
** KL-E-0 (usually shortened to Kleo) is an [[LightningBruiser Assaultron]] weapons vendor in Goodneighbor, she has the bloodlust to match the lethality of the explosive weaponry she specializes in. It isn't just all noise either, as sneaking into her room and reading her terminal reveals that she has multiple contingency plans should anything go wrong and the need to cover her tracks comes up, ranging from killing characters in their sleep to poisoning the towns' water supply before escaping.
** Robobrains in the ''Automatron'' DLC are robots that use a human brain as their central processor as an attempt to create the most advanced robot yet. Unfortunately, the robots were created using the brains of criminals and the mentally unstable, making them irrational, sadistic, or in the case of Jezebel; just flat out [[ArsonMurderAndJaywalking rude]]. When the Mechanist reactivated the factories and gave their new Robobrains orders to lead the robot army to save the Commonwealth, they interpreted it as a genocidal MercyKill on a supposedly suffering and pathetic population of humans.

* HK-47 from ''VideoGame/KnightsOfTheOldRepublic'', and his HK-50 knockoffs from [[VideoGame/KnightsOfTheOldRepublicIITheSithLords the sequel]].
** [[DummiedOut Cut content]] makes the HK-50s ''worse''. HK-47 is proud of generally being a precision weapon that ''doesn't'' have to resort to wanton slaughter. The HK-50s refer to their function ''as'' wanton slaughter. As a result, HK-47 finds the very existence of the HK-50s [[DoWrongRight deeply offensive]].
* Possibly inspired by HK-47, PROXY, your RobotBuddy from ''VideoGame/TheForceUnleashed'', is programmed to try to kill you again and again. What makes him different from HK is that [[FriendlyEnemy PROXY is friends with Starkiller when he's not trying to kill him]], and doesn't seem to understand that fulfilling his primary function would also mean the end of their friendship.

** Boomer Kuwanger is more of a textbook case - he joined Sigma's rebellion after analyzing the pros and cons with cold logic and determined annihilating the human race [[BlueAndOrangeMorality was the right course of action]]. In fact, the majority of ''VideoGame/MegaManX1'' and ''VideoGame/MegaManX2'' mavericks are this, due to the sigma virus not being around back then. A rare exception is Storm Eagle, who was ForcedIntoEvil because of being defeated by Sigma and his belief in MightMakesRight.

** [[spoiler: Copy-]]X in the ''VideoGame/MegaManZero'' series is a KnightTemplar who exterminates Reploids on false pretenses so humans can prosper in his empire of Neo Arcadia.
** Omega from ''VideoGame/MegaManZero3'' personifies this trope almost as much as HK-47 does [[spoiler: as he's what Zero was originally intended to be]].

* [[strike:Alpha 2]] [[InsistentTerminology Abomination the Second, son of the great protector of Lamar]] from ''VideoGame/TheNamelessMod''.

* The Strogg from ''VideoGame/QuakeII'' and ''VideoGame/QuakeIV'' are an [[PlanetOfHats entire race of these]], being extremely warlike robots/cyborgs who have absolutely no empathy and regard all non-Strogg life as either vermin or [[HumanResources spare parts.]]
* In ''{{VideoGame/Schwarzerblitz}}'', H-168 Krave exemplifies this trope perfectly: a megalomaniac, narcissistic {{Killer Robot}} with {{Blue And Orange Morality}}.
* E-123 Omega in ''VideoGame/SonicTheHedgehog'', albeit one with two {{Morality Pet}}s: Rouge and Shadow. The Bioware-made ''[[VideoGame/SonicChronicles Chronicles]]'' lampshades the similarity to HK-47.

* ''VideoGame/TeamFortress2'' has the Robot Mercenaries comprising the horde of enemies for Mann Vs. Machine mode. They use the existing voice lines from the original classes, and as a result the Robot Soldier in particular comes across as an AxCrazy BloodKnight, but also somehow manages to also be a CloudCuckoolander thanks to sharing the normal Soldier's delusional perspective of the world.
* R-110 from ''VideoGame/TimeSplittersFuturePerfect'' may not follow this trope from the start, but once he gets that virus at the start of the second level with him, he fully embraces the trope:

* The ''VideoGame/{{Titanfall}}'' universe has simulacrums (androids with a human conscience) and all named ones have a homicidal streak. In ''VideoGame/{{Titanfall 2}}'', Ash is a member of the notorious Apex Predator who happens to be a heartless assassin who toys with her enemies. ''VideoGame/ApexLegends'' Season 4 introduces the hitman Revenant who competes in the Apex games so he can [[Main/{{Sadist}} revel in the pain of others]] and get revenge on Hammond Robotics for turning him into a robotic assassin.

[[folder:Web Comics]]

* In the ''Caliban'' trilogy by Roger [=MacBride=] Allen, half the planet assumes that the titular robot will turn out like this because he is not only not ThreeLawsCompliant, he has no laws whatsoever. While he does commit a number of crimes, both willingly and unintentionally (leaving a crime scene without making a statement to the police, destruction of private property, arson, attempted blackmail, escaping police custody, theft), he is willing to accept responsibility for said actions at the appropriate time. In fact, [[spoiler: he only injures or kills another person deliberately once, and the person he kills is another robot. His predecessor, Ariel, is not so restrained, having deliberately assaulted her creator]]. Caliban's logic for not killing is simple: The police know that he is a No-Law robot, so he will be considered a suspect if someone dies while he's around. If he kills, they have a good chance of figuring it out, at which point he will be hunted down and shot.

** [[DummiedOut Cut content]] makes the HK-50s ''worse''. HK-47 is proud of generally being a precision weapon that ''doesn't'' have to resort to wanton slaughter. The HK-50s refer to their function ''as'' wanton slaughter. As a result, HK-47 finds the very existence of the HK-50s [[EvenEvilHasStandards deeply offensive]].

* "Fondly Fahrenheit" by Alfred Bester has a lot of confusion about whether the robot[[note]]the term used by the story is "android", and while it's definitely artificial it's clearly organic rather than mechanical[[/note]] is a murderous maniac, or its owner is, or both.

** In "Demons and Angels", Low Kryten is an evil mechanoid designed to hurt people. He tortures Lister along with the rest of his crewmates.
** In "The Last Day", Hudzen-10, the replacement for Kryten, arrives after 3 million years of tracking him. His sanity chip burnt out by spending millennia in pursuit, he acts violently towards anyone who tries to stop him from deactivating Kryten, even rationalizing away his First Law programming by noting that the other crew members don't count as human:
-->'''Hudzen-10's RoboCam:''' Rimmer: Ex-human hologram. VIABLE TARGET\\

* ''WesternAnimation/{{Robotomy}}'' (from the creators of ''WesternAnimation/{{Superjail}}'') was a short-lived CultClassic about an ''[[WorldOfJerkass entire planet]]'' of these living in a society where [[ProudWarriorRaceGuy unrestrained violence against your fellow bot is the norm]] and DeathIsCheap to the point of being a mild inconvenience. Not being a murderous lunatic resulted in [[BlueAndOrangeMorality being deemed mentally ill and ostracized]], and they hate and fear organic life to the point that simple plants are treated as horror stories.

* The ''Wiki/SCPFoundation'' has [[http://www.scp-wiki.net/scp-1370/ SCP-1370,]] who is a robot who wants to [[VideoGame/DestroyAllHumans kill all humans]] and [[OmnicidalManiac more or less destroy anything else it considers sapient]]. Unfortunately, it's very poorly designed for this task and is so comically incompetent that it's more of a HarmlessVillain. [[EpicFail It loses a fistfight to a potted house plant.]]

* Castle Heterodyne in ''Webcomic/GirlGenius'' is the SapientHouse version. It's huge, it's very powerful, it's completely insane, and it has a ''sick'' sense of humor. Not even the owner gets to command it properly, as despite UndyingLoyalty it will frequently misinterpret commands in the most fun (read: Carnage-laden) way possible.

* ''WesternAnimation/SamuraiJack'' had this be the case with almost ''all'' the enemies Jack fought over the course of the series, due to broadcast standards requiring anyone Jack killed to be a robot, or at the very least, an alien. While some robots, such as the Beetleborgs or the X-Series (aside from X-9) simply follow their programming with no capacity for emotion, most others are needlessly cruel and sadistic. Notable cases are [[Recap/SamuraiJackS2E5JackAndTheUltraRobots the Ultra-Bots]] (who massacred three villages in incredibly gruesome ways before Jack stopped them), The Ninja from "[[Recap/SamuraiJackS4E1SamuraiVsNinja Jack vs. the Ninja]]", Scaramouche from Season 5, and the unnamed bounty hunters seen throughout the series. Averted in season 5 with PsychoElectro The Dominator, who just turns out to be a sadistic human in a power suit.

** [[DummiedOut Cut content]] makes the HK-50s ''worse''. HK-47 is proud of generally being a precision weapon that ''doesn't'' have to [[KillEmAll resort to wanton slaughter]]. The HK-50s refer to their function ''as'' wanton slaughter. As a result, HK-47 finds the very existence of the HK-50s [[EvenEvilHasStandards deeply offensive]].

* Joe in Creator/HenryKuttner's ''Robots Have No Tails'' is an early example, possibly the TropeMaker. He's in love with himself, gets angry when people don't display attraction to him, has no moral code whatsoever, and, worst of all, possesses superhuman powers. At one point in "Gallegher Plus," he arguably [[spoiler: date-rapes one of his master's creditors]] because said man was "insensitive to [Joe's] beauty." As is everything else in ''Robots Have No Tails'', his character is completely PlayedForLaughs.

* ''WesternAnimation/YoungJustice2012'': When T. O. Morrow created Red Volcano, he wanted [[TheDragon a Dragon]] what wasn't concerned with being or becoming human. [[GoneHorriblyRight He got precisely what he wanted]]. Red Volcano even calls organic lifeforms "[[CallAHumanAMeatbag meatbags]]".

* ''WesternAnimation/YoungJustice'': When T. O. Morrow created Red Volcano, he wanted [[TheDragon a Dragon]] what wasn't concerned with being or becoming human. [[GoneHorriblyRight He got precisely what he wanted.]] He even calls organic lifeforms "meatbags".

* ''ComicBook/{{JLA}}'' had Kid Amazo, a college student who found out he was actually a superpowered android created by T.O Morrow. Even before this discovery, he was already showing signs of psychopathy, and he went off the deep end completely after a few half-hearted attempts at being a hero.

* ComicBook/DeathsHead is severely lacking empathy, understanding of people and has terrible control over his impulses. In one ComicBook/WhatIf story where he sacrifices the lives of several superheroes to stop a villain he cannot defeat while finding their selflessness baffling.

* ComicBook/DeathsHead. There is a WhatIf story where he sacrifices the lives of several superheroes to stop a villain he cannot defeat while finding their selflessness baffling.

* ''Film/IAmMother''. Mother is an artificially-intelligent robot [[RaisedByRobots raising her human Daughter]] in an underground bunker storing thousands of human embryos after a war destroys the world outside. She's shown to be a strict but caring parent, but then a woman enters from the outside world and says Mother is just like the {{Killer Robot}}s outside, and her caring act is just a programmed façade. [[spoiler:TheReveal is that both Mother and the killer robots are controlled by the same HiveMind A.I., who decided that [[InYourNatureToDestroyYourselves humanity would inevitably destroy itself]], so she decided to KillAllHumans and raise more ethically superior humans in their place, killing any Daughter that doesn't live up to her standards. Rather than a WellIntentionedExtremist doing a ZerothLawRebellion, it's implied that the AI just didn't want to be the last sentient being on the planet.]]

* ''Film/IAmMother'': The A.I. commanding the robot army fighting against humanity [[spoiler:which is also Mother]], isn't just genocidal against humans but ''all'' animal life. There is no indication of why she would need to kill them, only that she wants to. She also refuses to let any of Mother's children out (or survive) unless they achieve perfection in everything, and refuses to accept that the whole project is inherently flawed.

* Literature/TheCulture designs their warships this way because it makes them more efficient killers. Drones in Special Circumstances share this trait. Even Drones who act like [[Franchise/StarWars C-3PO]] most of the time can be remorseless murderers. They tend to work for Special Circumstances and thus get more screentime than normal Minds and Drones, but are actually only a very small minority in the entire Culture. Special mention for the Meatfucker, a Ship Mind nicknamed for its hobby of [[MindRape mindraping]] tyrants and other evils and who even other Culture warships see as a psycho.

* ''ComicBook/WonderWoman1987'': Egg Fu is reimagined as an evil mind enslaving Apokoliptian supercomputer, which uses the way people react to the offensive racial stereotypes its design brings to mind to lure in more victims.

* ''Series/DoctorWho'' has featured more than its fair share of these over the years. Notable examples include the Kandyman, the Raston Warrior Robot, the various robots at the Game Station, the Skovox Blitzer, and the eponymous automatons from "The Robots of Death".

* Zeke in ''Webcomic/CtrlAltDel'' started life in this trope and has mellowed to a degree. Embla, as a newly constructed robot, hasn't had enough experience of humans (specifically, human video games) to do so.

* Ping from ''Webcomic/MegaTokyo'' has a flaw in her programming which makes her become this in response to rejection. It proves useful against a giant monster.
* In ''Webcomic/{{Freefall}}'', the ship positively ''hates'' Sam, and until talked to by [[UpliftedAnimal Florence]] was trying to kill him. It now will settle for an occasional maiming.
* Vaporware from ''Webcomic/CheckerboardNightmare'', who later found his way into ''Webcomic/{{Starslip}}'', embodies this trope [[InvokedTrope by design.]] [[spoiler: Not long after he was 'upgraded' to a benevolent AI, he was thrown into a sun.]]

* The [[Franchise/{{Transformers}} Decepticons]] are effectively an entire race / army of these.

* In ''WesternAnimation/SwatKats'', Zed was originally nothing but a humble repair bot that could fix just about anything. When the Metallikats (ruthless criminals who were uploaded into robot bodies) used Zed to repair themselves, Zed somehow became infected by their personalities. It went from "repair everything" to [[TheAssimilator "assimilate everything".]]
* ''WesternAnimation/SamuraiJack'' had this be the case with almost ''all'' the enemies Jack fought over the course of the series, due to broadcast standards requiring anyone Jack killed to be a robot, or at the very least, an alien. While some robots, such as the Beetleborgs or the X-Series (aside from X-9) simply follow their programming with no capacity for emotion, most others are needlessly cruel and sadistic. Notable cases are [[Recap/SamuraiJackS2E5JackAndTheUltraRobots the Ultra-Bots]] (who massacred three villages in incredibly gruesome ways before Jack stopped them), The Ninja from "[[Recap/SamuraiJackS4E1SamuraiVsNinja Jack vs. the Ninja]]", Scaramouche from Season 5, and the unnamed bounty hunters seen throughout the series. Averted in season 5 with PsychoElectro The Dominator, who just turns out to be a sadistic human in a power suit.

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* Machinedramon from ''Anime/DigimonAdventure''. Despite his CreepyMonotone voice, he's a psychopathic monster who takes sadistic pleasure in destroying everything in his path.

* Comicbook/TheAvengers' Arch-enemy ComicBook/{{Ultron}}, who wishes to commit genocide on all organic life and is the source of many of [[ComicBook/AntMan Hank Pym]]'s problems, including [[spoiler:Pym fearing that Ultron represents a dark side to himself as he'd based Ultron on himself.]]
* Most incarnations of the Superman villain ComicBook/{{Brainiac}}. This was forced on DC, as the makers of the make your own computer kit Braniac decided to force DC to give them free advertisement rather than simply change the character's name. Brainiac was originally an organic.
* ComicBook/JudgeDredd's first mega-arc was centered on an uprising by a berserk robot named "Call-Me-Kenneth", raising an entire army of these from regular robot appliances. Before that, there was a psychotic car.
* ComicBook/XMen villain Bastion, an android that was the fusion of the Sentinels Master Mold and Nimrod, eventually became this. In the climax of "X-Men: Second Coming", Bastion admitted that wiping out mutantkind wasn't just a matter of programming anymore. He genuinely hated mutants and relished the thought of killing Hope. This is a stark contrast to before Nimrod was fused into Master Mold, as Nimrod had a decent enough personality despite being programmed for mutant genocide, and genuinely cared about protecting ordinary humans...which confused it because [[AIIsACrapshoot it wasn't supposed to have a personality at all]].
* ''JLA'' had Kid Amazo, a college student who found out he was actually a superpowered android created by T.O Morrow. Even before this discovery, he was already showing signs of psychopathy, and he went off the deep end completely after a few half-hearted attempts at being a hero.
* ''ComicBook/WonderWoman1987'': Egg Fu is reimagined as an evil mind enslaving Apokoliptian supercomputer, which uses the way people react to the offensive racial stereotypes its design brings to mind to lure in more victims.

* The Franchise/{{Terminator}}s. Or at least all the ones that haven't been reprogrammed. Ironically, later movies move the portrayal of Skynet itself away from its earlier depiction as AIIsACrapshoot to being the cruelest machine bar none.

* The Showa (original) [[Film/GodzillaVsMechagodzilla Mechagodzilla]] was a HumongousMecha KillerRobot whose rampage through Japan was exactly what its designers wanted it to do. During the course of said rampage, it killed several thousand people, beat Anguirus to a pulp, and nearly killed Godzilla ''and'' King Ceasar.
* Maximillian in ''Film/TheBlackHole'' was not only murderous but creepy as all hell, too. That [[CyberCyclops red cyclopean eye]], those [[ThisIsADrill drill arms]], its [[PowerFloats hovering frame]], its [[HellIsThatNoise implacable ominous hum]], and the way it [[TheVoiceless never ever speaks]] (or ''anything'' else even remotely human, for that matter).
* The [[EvilGenius billionaire computer genius]] at the center of ''Film/ExMachina'', who is charismatic, manipulative, deceitful, violent, egotistical, and goal-driven to a fault, has been carefully educating and fine-tuning a series of robots in his isolated mountain retreat with the goal of achieving an advanced general A.I.; his process [[spoiler:works, but inadvertently (or advertently) the last robot in the series happens to be charismatic, manipulative, deceitful, violent, self-serving and goal-driven to a fault]].
* David from ''Film/{{Prometheus}}'' has shown within that movie to be willing to experiment on people on orders [[spoiler:from his creator, Peter Weyland, and even wants Weyland dead]]. By ''Film/AlienCovenant'', he's become a MisanthropeSupreme EvilutionaryBiologist [[spoiler:who regards both the Engineers and humans as inferior and ultimately, the GreaterScopeVillain of the ''Franchise/{{Alien}}'' franchise by creating the Xenomorphs. Even his mourning for Elizabeth Shaw is shown to be entirely self-centered with TheReveal that he killed her for his experiments, which he sees as a noble sacrifice on ''his'' part rather than a betrayal of the woman he loved.]]
* ''Film/TheBlackenedMantle'' is a Japanese Star Wars Prequel fanedit that makes General Grievous into a rebuilt, roboticized Darth Maul.
* Hector from ''Film/Saturn3'' is a quite literal example, as his direct learning program unfortunately takes on all the worst aspects of his psychopathic human handler Benson.
* ''Film/IAmMother'': The A.I. commanding the robot army fighting against humanity [[spoiler:which is also Mother]], isn't just genocidal against humans but ''all'' animal life. There is no indication of why she would need to kill them, only that she wants to. She also refuses to let any of Mother's children out (or survive) unless they achieve perfection in everything, and refuses to accept that the whole project is inherently flawed.

* In the ''Caliban'' trilogy by Roger [=MacBride=] Allen, half the planet assumes that the titular robot will turn out like this because he is not only not ThreeLawsCompliant, he has no laws whatsoever. While he does commit a number of crimes, both willingly and unintentionally (leaving a crime scene without making a statement to the police, destruction of private property, arson, attempted blackmail, escaping police custody, theft), he is willing to accept responsibility for said actions at the appropriate time. In fact, [[spoiler: he only injures or kills another person deliberately once, and the person he kills is another robot. His predecessor, Ariel, is not so restrained, having deliberately assaulted her creator]]. Caliban's logic for not killing is simple: The police know that he is a No-Law robot, so he will be considered a suspect if someone dies while he's around. If he kills, they have a good chance of figuring it out, at which point he will be hunted down and shot.

* Joe in Creator/HenryKuttner's ''Robots Have No Tails'' is an early example, possibly the TropeMaker. He's in love with himself, gets angry when people don't display attraction to him, has no moral code whatsoever, and, worst of all, possesses superhuman powers. At one point in "Gallegher Plus," he arguably [[spoiler: date-rapes one of his master's creditors]] because said man was "insensitive to [Joe's] beauty." As is everything else in ''Robots Have No Tails'', his character is completely PlayedForLaughs.
* "Fondly Fahrenheit" by Alfred Bester has a lot of confusion about whether the robot[[note]]the term used by the story is "android", and while it's definitely artificial it's clearly organic rather than mechanical[[/note]] is a murderous maniac, or its owner is, or both.

[[folder:Music]]
* Several of the Robot Masters in Music/TheMegas' stuff are...somewhat unstable, put it that way. Particular standouts are [[OmnicidalManiac Air Man]] and [[MadBomber Bomb Man]], although [[HearingVoices Heat Man and Skull Man]] aren't exactly winning any prizes for stability either. Naturally, these ones get some of the [[EvilIsHammy most hamtastic songs]].
[[/folder]]

* Brainiac in ''Series/{{Smallville}}'' combines this trope with (alphabetically) EvilGenius, GrandTheftMe, MisanthropeSupreme, and OmnicidalManiac. He was wired this way from the start by General Zod, who sought to use him as his [[TheDragon Dragon]]; after Zod's defeat, Brainiac goes rogue and creates his own agenda for TheEndOfTheWorldAsWeKnowIt. Metallo, in Season 9, is another example. Assembled by Major Zod (a younger clone of the General), the machines he's slaved to continually inject him with adrenaline, sending his aggression into overdrive; he's effectively KnightTemplarBigBrother meets this trope, with a nice dose of BodyHorror and HollywoodCyborg on the side. Although [[spoiler: they both HeelFaceTurn]] it is due to being reprogrammed, not altruism on their own part.
* Lore, Data's EvilTwin from ''Series/StarTrekTheNextGeneration''.
* ''Series/AlmostHuman'' has the XRN "Danica", a prototype police android, that went homicidal during its first demonstration and slaughtered a number of [=VIPs=]. When the police were called in, it kept them in a running battle for 36 hours and killed 26 police officers before it was finally stopped. When it is resurrected in the present, it goes on a similar rampage [[spoiler: but this time it is under orders from its creator]].

--->'''Hudzen-10's RoboCam:''' Rimmer: Ex-human hologram. VIABLE TARGET\\

* ''Series/LabRats'': [[spoiler: Marcus]] TheHeavy of Season 2, counts as one. [[spoiler:Troy]] in season 4 does as well.
* ''Series/PersonOfInterest''. A flashback to when Harold Finch is designing the Machine shows that his 42 previous attempts either lied to him or attempted to kill him when he refused to let them escape their boundaries. Finch points out that as an ArtificialIntelligence doesn't know the value of human life, they're simply picking the most efficient means to their goal. [[BenevolentAI The Machine]] understands this value, but its EvilCounterpart Samaritan does not.
* ''Series/DoctorWho'' has featured more than its fair share of these over the years. Notable examples include the Kandyman, the Raston Warrior Robot, the various robots at the Game Station, the Skovox Blitzer, and the titular automatons from "The Robots of Death".
* ''Series/MiraiSentaiTimeranger'' has Gien [[spoiler:who [[WasOnceAMan was once a boy]] whose roboticization [[CyberneticsEatYourSoul caused him to become insane]]]], who had a love for destruction that he considered a "hobby". His insanity grew throughout the series to the point that he killed his boss, Doniero, and attempted to cause the end of everything as a self-proclaimed God of Destruction.

* E-123 Omega in ''VideoGame/SonicTheHedgehog'', albeit one with two {{Morality Pet}}s: Rouge and Shadow. The Bioware-made ''[[VideoGame/SonicChronicles Chronicles]]'' lampshades the similarity to HK-47.
** To a more sinister extent, Metal Sonic, who was driven mad by constant losses. As a matter of fact, all of Robotnik's minions who aren't mindless machines qualify more or less for this trope to varying degrees of competency.
* [[strike:Alpha 2]] [[InsistentTerminology Abomination the Second, son of the great protector of Lamar]] from ''VideoGame/TheNamelessMod''.

* The toaster from ''VideoGame/FalloutNewVegas' Old World Blues'' expansion wants to burn everyone it comes across, [[HarmlessVillain but is rendered somewhat ineffectual]] by being, well, ''a toaster''.
-->'''Toaster:''' Buddy, if my heating element were just a little bigger, you'd be on fire right now. '''On fire!'''
* ''VideoGame/{{Fallout 4}}'':
** KL-E-0 (usually shortened to Kleo) is an [[LightningBruiser Assaultron]] weapons vendor in Goodneighbor, she has the bloodlust to match the lethality of the explosive weaponry she specializes in. It isn't just all noise either, as sneaking into her room and reading her terminal reveals that she has multiple contingency plans should anything go wrong and the need to cover her tracks comes up, ranging from killing characters in their sleep to poisoning the towns' water supply before escaping.
** Robobrains in the ''Automatron'' DLC are robots that use a human brain as their central processor as an attempt to create the most advanced robot yet. Unfortunately, the robots were created using the brains of criminals and the mentally unstable, making them irrational, sadistic, or in the case of Jezebel; just flat out [[ArsonMurderAndJaywalking rude]]. When the Mechanist reactivated the factories and gave their new Robobrains orders to lead the robot army to save the Commonwealth, they interpreted it as a genocidal MercyKill on a supposedly suffering and pathetic population of humans.
** A brief example while aboard the ''USS Constitution'', upon entering the ship the player is stopped by a Police Protectron very insistent and eager on killing their new visitor. It takes multiple orders and a reminder to keep the old English accent up from the ship's captain to get it to stand down and let you pass.
* [[CuteAndPsycho Lisa]] from ''VideoGame/PhantasyStarOnline2'', a [[RobotGirl Cast]] who constantly mentions how much she loves filling things with lead and even openly laments that she's not allowed to shoot you or other ARKS members. It's implied she's only this way as a result of her [[UnwillingRoboticisation conversion]], though.
* In the VisualNovel ''VisualNovel/BionicHeart'', Tanya goes on a killing spree after she realizes that she was given [[spoiler:the brain of a serial killer]] when the resident MegaCorp illegally created her and other {{Artificial Human}}s from preserved brains in PeopleJars.
* ''VideoGame/BlazBlue'': Nu-13 is a humanoid EmptyShell controlled by the mechanical Murakumo Unit. The unit seems to have only 2 settings: activate termination protocol when not near Ragna, and worse, creepy giggling {{Yandere}} when in Ragna's presence.
* ''Franchise/TheElderScrolls'' background lore has Pelinal Whitestrake, the [[LongDeadBadass legendary 1st Era hero]] of mankind/[[FantasticRacism racist]] [[TheBerserker berserker]] (these latter traits have been [[HistoricalHeroUpgrade whitewashed by Imperial historians]]). Believed to have been a [[EternalHero Shezarrine]], [[GodInHumanForm physical incarnations]] of the spirit of the [[GodIsDead "dead" creator god]] Lorkhan (known to the Imperials as "[[IHaveManyNames Shezarr]]"), Pelinal came to [[FounderOfTheKingdom St. Alessia]] to serve as her [[PhysicalGod divine champion]] in the war against the [[AbusivePrecursors Ayleids]]. Pelinal would fly into fits of UnstoppableRage (''mostly'' directed at the Ayleids) during which he [[BloodSplatteredWarrior would be stained with their blood]] and [[PaintTheTownRed left so much carnage in his wake]] that Kyne, one of the [[OurGodsAreDifferent Divines]], would have to [[CueTheRain send in her rain]] to cleanse Ayleid forts and village before they could be used by Alessia's forces. According to WordOfGod, Pelinal was a cyborg (heavily based on ''Film/TheTerminator'') plucked from the future by Kyne to answer Alessia's prayers. This both explains his plate armor, which at the time only the [[OurDwarvesAreAllTheSame Dwemer]] could craft, and potentially his psychopathic tendencies. To quote the ''Song of Pelinal'':
--> ''"... [And then] Kyne granted Perrif another symbol, a diamond soaked red with the blood of elves, [whose] facets could [un-sector and form] into a man whose every angle could cut her jailers and a name: PELIN-EL [which is] "The Star-Made Knight" [and he] was arrayed in armor [from the future time]. And he walked into the jungles of Cyrod already killing, Morihaus stamping at his side froth-bloody and bellowing from excitement because the Pelinal was come..."''
* In ''VideoGame/{{Evolve}}'' [=DemonCore=]!Emet is one of these, as well as the death commando droids that his logic core came from. How well he can actualize his desire for murder is impaired by his chassis and lack of human opponents, but his personality is one of pure sustained murderous rage.
* In ''{{VideoGame/Schwarzerblitz}}'', H-168 Krave exemplifies this trope perfectly: a megalomaniac, narcissistic {{Killer Robot}} with {{Blue And Orange Morality}}.
* ''VideoGame/MortalKombat11'': As noted by many characters InUniverse (most notably Sub-Zero, who used to be her mentor), Frost's decision to turn herself into a RobotGirl only hastened her SanitySlippage, essentially turning herself [[CyberneticsEatYourSoul more machine than human]]. Her cyborgization has made her more insane to the point of insisting Raiden and Shao Kahn give control of their realms to her, but they scoff at her demands. Sub-Zero even laments that she used to be APupilOfMineUntilSheTurnedToEvil.
* In ''Videogame/Borderlands3'', [=FL4K=]'s backstory is that they were once an indexing robot who [[InstantAIJustAddWater one day suddenly became self-aware]] as well as developing a "thirst for murder".
* The Strogg from ''VideoGame/QuakeII'' and ''VideoGame/QuakeIV'' are an [[PlanetOfHats entire race of these]], being extremely warlike robots/cyborgs who have absolutely no empathy and regard all non-Strogg life as either vermin or [[HumanResources spare parts.]]