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Available to play

Ultrakill in Ultrakill

Plays ULTRAKILL on in-game terminals inside ULTRAKILL, three instances deep.

Source

What it does

Three ULTRAKILL instances run at once; each frame, screenshots are passed between them through memory-mapped files and drawn on in-game terminals, and dedicated keys switch which instance the player controls, giving a game-inside-a-game-inside-a-game.

How it works

BepInEx plugin; three game instances exchange frames through memory-mapped files

Requirements & limitations

ULTRAKILL with BepInEx, and three separate copies of the game folder each running the plugin (the prebuilt UltrakillInUltrakill.dll is in the repository).

Original sources

Evidence limits

The GitHub README and file tree were reviewed on 2026-10-08 (prebuilt DLL and plugin source, no licence file, no tagged releases). No independent catalogue play-test or binary safety review was performed.

Code and releases are linked, not hosted here. Game files and footage retain their owners’ rights.