The "Sonic" creepypasta often refers to various horror-themed fan stories and urban legends involving the popular video game character Sonic the Hedgehog. One of the most well-known Sonic creepypasta stories is titled "Sonic.EXE."
In "Sonic.EXE," the story centers on a supposedly haunted or cursed version of a Sonic video game. The narrative follows a character who discovers a strange and unsettling game featuring Sonic. When they play it, they encounter disturbing imagery, unsettling music, and a dark twist on the character's usual cheerful demeanor. The story features themes of horror, madness, and the idea that the game is somehow sentient and malevolent.
Other Sonic creepypasta stories may revolve around similar themes of horror, glitches, or corrupted games, but "Sonic.EXE" remains one of the most iconic examples, spawning various adaptations, fan art, and even animations due to its popularity within the creepypasta community.