The Murder of Sonic the Hedgehog is a video game in the Sonic the Hedgehog series that was released in late March 2023 on Steam for free as an April Fools' Day prank. It is a visual novel-styled game with a mystery theme, starring an unnamed quokka (whom the player is prompted to assign a name to) who must help figure out who "killed" Sonic the Hedgehog in a murder mystery game.