Sonic.Exe: Nightmare Beginning

Sonic.Exe: Nightmare Beginning is a fangame based on the Sonic the Hedgehog universe. The Arch-Demon Exetior escaped from the hellish prison and wants to take control over Sonic's body, but due to Sonic's strong will, he will have to destroy Sonic's main points of determination: Tails, Knuckles and Eggman.

This is a remake of another Sonic fangame: Sonic.EXE: The Game, that was based on the popular creepypasta Sonic.exe. The game is a 2D platformer, where you play as Tails, Knuckles or Eggman. Depending on your actions in the game, you will get one of eight endings.