The Killer Robot in its cell in an early version of the elevator scene.

The Killer Robot, a.k.a the Mecha-Scorpion, is a monster that is first seen in the Elevator Cube Prison while Dana and Marty are trapped. It isn't listed on the whiteboard.

Physical Description & AttributesEdit

The Killer Robot is designed as an enormous, yellow, spider-like robot with four fast pneumatic legs and three arms; one small one in the front and two long ones in back armed with loud, squealing buzz-saws. The smaller arms are capable of shooting out a pair of grappling hooks to snag and drag humans closer to the robot, allowing it to deliver a killing blow with its buzz-saws. In the novelization, it is described as a "robot with flaming hands" as opposed to its buzz-saw type arms.

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The robot is seen throughout the Purge when the elevators first open, where it launched grappling hooks to two guards and dragged them close and eviscerated them with its fast rotating buzzsaws, while also killing the guard wrapped by the Giant Snake. It is later seen on security footage scrambling after facility workers down a flight of stairs.

It is summoned by a buzz saw, hidden somewhere in the cellar.


In many science fiction stories (notably not the ones written by Isaac Asimov), robots are shown to be deuteragonist characters that can either be allies or enemies to humans, depending on their programming. The Killer Robot refers to classic homicidal machines who were either strictly designed to kill organic lifeforms or gained sentience (whether supernaturally or by a possible malfunction) and garnered a gradual disdain for humanity; deeming them to be "inferior beings" and must be destroyed outright.

Perhaps, one of the most notable examples of a killer machine is The Mangler though others are H.A.L. 9000 (or just "HAL") from 2001: A Space Odyssey. Similar examples to the one shown in the film are ED-209 from RoboCop, AMEE from Red Planet, the "evil" reprogrammed machines from Terminator 3: Rise of the Machines, and the one in Zathura, who in itself is a tribute to b-movie sci-fi\sci-fi horror robots, such as the ones seen in Hardware, Robot Wars and Chopping Mall and the 2011 short BlinkyTM.