- "Took 2 months to build, the axe is powered by a wheelchair motor. Ready for thrills and suspense? Hitchcock's Psycho wasn't as frightening as this! Coming mother!"
- — Jonathan Pearce introduces Psychokiller
Psychokiller was a yellow wedge-shaped robot with a red face-like design on the front, which was said to be inspired by Salvador Dali's paintings. Its weapon was a pickaxe powered by a wheelchair motor, with two furry hands fastened around the tip. The robot was driven by two Sinclair C5 motors, and overall took three months to build.
- "Classic wedge shape, with the axe, so hopefully that will work very well; we know from the past it does."
- — Philippa Forrester looks over Psychokiller in the pits
Psychokiller faced Dreadnaut in the first round of the Third Wars. The two robots immediately collided head-on, but did very little damage to each other. Psychokiller briefly circled the flame pit before driving into Sir Killalot, who snapped off its axe. Dreadnaut then pushed Psychokiller back onto the flame pit, where it was attacked and shoved away by Shunt. As Dreadnaut came in for another attack, Psychokiller drove towards Dead Metal's CPZ, where it was caught on an arena spike and immobilised.
- "It's been a nightmare for them out there! Psycho battle, let alone Psychokiller!"
- — Jonathan Pearce as Psychokiller lies immobile
At this point, Dreadnaut and the House Robots closed in on Psychokiller. Shunt embedded his axe in the top of Psychokiller, lifting it up slightly, as Sir Killalot used his lance to flip the robot over, Jonathan Pearce noting visible damage on all sides. The House Robots continued to damage Psychokiller before 'cease' was called.
|PSYCHOKILLER - RESULTS|
|The Third Wars - UK Championship|
Heat, Round 1
|Heat P, Round 1||vs. Dreadnaut||Lost|
- Wins: 0
- Losses: 1
|Series||Psychokiller Series Record|
|The First Wars||Did not enter|
|The Second Wars||Did not enter|
|The Third Wars||Heat, Round 1|
|The Fourth Wars||Did not enter|
|The Fifth Wars||Did not enter|
|The Sixth Wars||Did not enter|
|The Seventh Wars||Did not enter|
|Series 8||Did not enter|
|Series 9||Did not enter|
|Series 10||Did not enter|
- Jonathan Pearce claimed Psychokiller took two months to build, but the robot's statistics card said it took three months to build.
- Psychokiller may have been named after the Talking Heads' song of the same name.