How did sonicexe start killing?

Sonic.EXE originated from a creepypasta story that depicted a haunted video game featuring Sonic the Hedgehog. In the narrative, the protagonist discovers a cursed game where Sonic is portrayed as a malevolent entity, leading to disturbing events and the deaths of characters. The game is said to manipulate reality, causing harm to anyone who plays it. This eerie premise spawned various fan adaptations, expanding on the concept of Sonic.EXE as a killer.