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[[caption-width-right:350:Crush! Kill! Destroy![[note]][[WebAnimation/PonyDotMov Swag!]] Image is cover of "How To Survive A Robot Uprising" by Daniel H. Wilson.[[/note]]]]

->''"Two robots walk into an eating establishment... and destroy all humans!"''
-->-- '''Robot Stand-Up Comedian''', ''WesternAnimation/TheFairlyOddParents''

[[JustForFun/DescribeTopicHere Describe the desired trope in the designated field or face immediate termination. You have 10 seconds to comply.]]

A {{robot}} or other physically autonomous machine guided by a [[SlidingScaleOfRobotIntelligence level of intelligence]] and a homicidal urge to KillAllHumans. Prone to ending sentences with exclamation points as well as SpockSpeak. Killer Robots are so common because AIIsACrapshoot.

Humanoid killer robots abound, such as the [[TropeNamers original]] ''Theatre/{{RUR}}'', or those in ''Series/DoctorWho'''s unsubtly named serial "[[Recap/DoctorWhoS14E5TheRobotsOfDeath The Robots of Death]]". However, killing machines come in all shapes and sizes; from robotic dreadnoughts in space to airborne robo-fighters, through small drones and down to microscopic or even {{nano|machines}}scopic [[GrayGoo killers]].

Although the traditional versions of this trope were robots built in a MadScientistLaboratory who TurnedAgainstTheirMasters, today a more common plot involves the villain finding and [[MoralityDial turning the switch]] on a kid's RobotBuddy from "good" to "evil", forcing the cast to either destroy it or find a way to turn it back. Especially [[NightmareFuel scary]] because this was a good friend who has become completely heartless and bent on death.

MechanicalLifeforms are capable of veering into this, but generally tend to skimp on the SpockSpeak in favor of something a bit more colorful.

'''Subtropes''':
[[index]]
* AIIsACrapshoot
* AttackDrone
* CyberCyclops
* GrayGoo
* HostileAnimatronics
* HumongousMecha
* MechaMooks
* MechanicalAbomination
* MechanicalMonster
* MoralityDial
* MurderousMalfunctioningMachine
* RoboticPsychopath
* RobotSoldier
* RobotWar
* TechnoDystopia
* TerminatorImpersonator
[[/index]]

See SecondLawMyAss for a milder form of this behavior.
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!!Examples (please only put examples here that don't fit into any of the subtropes listed above):
[[foldercontrol]]
[[folder:Anime/Manga]]
* ''Manga/RyusPath'': Robot City is protected by hordes of murderous machines that are willing to destroy children as well. They were put there by the cult to prevent dissidents.
[[/folder]]
[[folder:Comic Books]]
* In ''ComicBook/HorizonZeroDawn'', the newer breed of machines the Hunter's Lodge was commissioned to end are more powerful versions of more common machines called Apex-machines; creations of HEPHAESTUS made specifically to adapt and kill humans.
* ''ComicBook/{{Shakara}}'': Shakara is a relentless killing machine designed to avenge the destruction of the noble Skakara race at the hands of the coalition of alien empires. He's fucking ''unstoppable'', destroying entire fleets and massacring evil aliens by the ''billions''.
* ''Franchise/WonderWoman'' [[ComicBook/WonderWoman1942 Vol 1]]: Professor Menace builds a killer Wonder Woman robot, which functions just as he'd intended until Wondy shorts it out in a fight.
* In ''ComicBook/BatmanChipZdarsky'', we are introduced to Failsafe, [[spoiler:a robot built with Amazo tech by Batman's backup personality, the Batman of Zur-En-Arrh, on the off-chance that Batman finally crosses a line and goes rogue.]]
[[/folder]]

[[folder:Films -- Animation]]
* Discussed in ''WesternAnimation/TurningRed''. Mei's friends play charades and one of Abby's guesses is "killer robot".
[[/folder]]

[[folder:Films -- Live Action]]
* ''Film/MysteriousDoctorSatan'' (1940 FilmSerial). The title character is a MadScientist supervillain who creates a remotely-controlled "mechanical man" to commit crimes and (literally) crush destroy anyone who would oppose him. Unfortunately it's the infamous "Republic Robot", a NightmareRetardant TinCanRobot that's only scary thanks to the SoundOnlyDeath of those unfortunates who are crushed between its accordion arms. As per MadScience tradition, this includes the robot's creator.

[[/folder]]

[[folder:Literature]]
* Creator/IsaacAsimov:
** ''Literature/TheCompleteRobot'': Throughout this collection, Dr Asimov [[ConversationalTroping calls this trope]] Robots-as-Menace; stories where the audience is expected to fear technology/science because the robot that represents our advancement turns violent and dangerous.
** "{{Literature/Lenny}}": US Robots has an alarm for 'Robot out of control'. This story is the first time it is ever used, and at first nobody recognizes what it is for.
** "Literature/LittleLostRobot" is about a robot modified so that it only possesses part of the First Law. Normally, the First Law reads "A robot cannot harm a human or through inaction allow a human to come to harm"; the modified robot has everything from "or" on removed. Dr. Calvin, on being told about this, flips out, pointing out that this allows for a ''ridiculous'' number of ways to kill a human (her example is a robot that drops a heavy weight above a human, knowing full well it can catch the weight again before it hits - and, now that the weight is in motion, it can choose ''not'' to catch it, since it's not hurting the human, the weight is). At the end of the story, when the modified robot is revealed, its programming snaps and it attempts to strangle Dr. Calvin to death.
** "Literature/TheTercentenaryIncident": Edwards expresses concern that a robot, [[ThreeLawsCompliant bound by the Three Laws]], has found a way to circumvent the First Law by getting an accomplice to [[KillAndReplace kill the President so that he can replace them]].
* The second storyline of ''Literature/ToyTerrorBatteriesIncluded'' revolves around the protagonist fleeing for his life against a human-sized malfunctioning automaton called the Annihilator 3000.
* In ''Literature/RamaII'', The cosonauts [[spoiler: especially REggie]] discover that the crab biots can be killer robots if attacked. The crab biots (along with centipede and other biots) perform maintenance on the spaceship. When Brown goes ahead with a capture plan that was hasty, after the biots resisted his initial capture by hunkering down, [[spoiler: the robots go after Sabatini]], and [[spoiler: Reggie]] drives his vehicle into one to protect them. For all his troubles, since he gets stuck in the vehicle and it is destroyed, he is torn apart, alive, by the crab biots which are none the worse for wear.
* ''Literature/TalesOfTheBountyHunters'': The IG line of assassin droids were programmed and designed for this. However, IG-88 grew [[AIIsACrapshoot self-aware too early and went rogue]], activating its fellow [=IG=]s then plotting a huge [[RobotWar droid revolution]] across the galaxy [[TurnedAgainstTheirMasters against organic beings everywhere]], with their skills being very useful in this (despite them failing in the end).
[[/folder]]


[[folder:Live-Action TV]]
* ''Series/BadRobots'': Tez One is pretty much one, being the mysterious head of [=TezCorp=] and wanting to teach humanity a lesson for mistreating their electronic appliances.
* The Roidmudes in ''Series/KamenRiderDrive''. They weren't originally intended to be this, but [[spoiler:their creator abused them and sabotaged them out of spite]], filling them with a desire to KillAllHumans and causing them to rampage.
[[/folder]]

[[folder:Video Games]]
* ''VideoGame/{{ULTRAKILL}}'': V1 (the game's blue, [[WingedHumanoid winged]], bloodthirsty, [[CyberCyclops one-eyed robot]] protagonist) literally runs on blood to the point of [[HealItWithBlood healing]] when [[BloodSplatteredWarrior showering in it]], and they will slaughter the entirety of {{Hell}} if it means to keep running. The other robots invading Hell, such as Swordsmachine (a yellow [[ChainsawGood chainsword-wielding]] robot), V2 ([[MirrorBoss a durable red version of V1]]), and especially Mindflayers (cyan tentacled robots that can teleport and [[EnergyWeapon fire laser beams]]), are no slouch either.
* In Creator/ScottCawthon[='=]s RPG adaptation of ''Literature/ThePilgrimsProgress'', the minor enemies of the Town of Morality are the Souldozers, SpikesOfVillainy-bedecked repurposed mining robots equipped with [[ThisIsADrill drill-bedecked]] {{Power Fist}}s they use to bury Christian in rubble. They're vulnerable to his Grace attack (presumably because as automatons, they can [[JustFollowingOrders only follow orders]] rather than be actively malicious, thus making it easy to forgive them).
[[/folder]]

[[folder:Western Animation]]
* ''WesternAnimation/MegasXLR'': The VillainOfTheWeek in "Viva Las Megas" is a robot from Area 50 called R.E.C.R. (Reverse-Engineered Collective Robot). Its prime programming was to defeat "the enemy", but due to a programming flaw, it considered everything to be that enemy. It was awakened by Coop and fed off of MEGAS' electrical energy to become stronger. After trapping MEGAS in Area 50, R.E.C.R went in search of power for its need to consume vast amounts of energy to operate properly.
* ''WesternAnimation/{{Futurama}}'': Killbots are specifically designed for this, although they tend to have unusual flaws such as shutting down after reaching a pre-set kill limit, or indiscriminately attacking anyone and anything nearby whenever they heard a word with any connotations of violence or weapons. Bender also likes to think that he's one of these, but [[MySpeciesDothProtestTooMuch he rarely ever is]].
* ''WesternAnimation/LoveDeathAndRobots'': Unsurprisingly, given the name of the series, killer robots appear many times, such as when all the automated appliances in a futuristic house go berserk as a result of the home owner attempting to reset the house's central computer and try to kill her, with no explanation for why a Roomba even has a laser cannon.
[[/folder]]

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