The most famous example is the original Sonic.exe creepypasta, which told the story of a possessed game disc that killed the player's characters one by one. This inspired countless developers on platforms like Game Jolt to create actual playable versions of the legend.
The player is often pursued by an omnipotent version of the character (e.g., Sonic.exe or Mr. L) who breaks the "fourth wall" by addressing the player directly. Creepy.exe
Siren Head - Horror Short Film 2025: Cursed Animations - TikTok The most famous example is the original Sonic