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[[caption-width-right:350:[[AC:[[http://www.robotuprising.com/ Crush! Kill! Destroy!]]]]]]

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

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 [[TropeNamer original]] ''Theatre/{{RUR}}'', or those in ''Series/DoctorWho'''s subtly 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.

* AIIsACrapshoot
* AttackDrone
* CrushKillDestroy
* CyberCyclops
* GrayGoo
* HostileAnimatronics
* HumongousMecha
* MechaMooks
* MechanicalMonster
* MoralityDial
* RoboticPsychopath
* RobotSoldier
* RobotWar
* TechnoDystopia

See SecondLawMyAss for a milder form of this behavior.

!!Examples (please only put examples here that don't fit into any of the subtropes listed above):

* ''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''.