AlterEgo is a puzzle platforming homebrew game that was originally made for the ZX Spectrum. You play a character that has a phantom alter ego that moves in mirrored fashion with them, either vertically or horizontally. This character can switch place with their alter ego to get around obstacles, but a limited number of times. The goal of the game is to collect items needed to complete the level while avoiding hazards along the way.
In this run, MarioAtWork and aiqiyou collaborate to complete the game in record time.