Sonic.EXe

Sonic.EXe is a popular creepypasta about a hacked/infected game with the main character being a malevolent version of Sonic hellbent on the torment of his friends.

History
Sonic.EXe is meant to be either a cursed or hacked game, or a combination of both. Sonic.EXe has had a signifincant impact on the world, from Darkweb purchases to Youtube challenges. He made his first impact on July 23rd, 1991, otherwise his creation date. That's right, turns out Sonic.EXE isn't a cursed, possessed, or hacked video game. He is a Creepypasta creation about a malicious entity who's only goal is to murder Sonic's friends.

Sonic.EXE (Sega 666)
The Sonic.EXE (SEGA 666) adaptation of the original game has sparked sequels and fan theories, but most popular is the original game, which supposedly wouldn't escape the disc player after being inserted. It also would give a hyper-realistic version of Sonic's face, with the words "I AM GOD" scribbled around the screen. After completing the game, a Sonic plush would appear on the narrator's bed and ask, "Try to keep this interesting for me, Tom..." Read the full story here. (Warning: you'll probably need to scroll a lot to get to the story.)

Trivia

 * Sonic.EXE's presence in the game will make the playable character expression slowly turn to worry.
 * Sonic.EXE's "I AM GOD" could be a reference to him thinking he is the higher being, or a mockery to God himself, as Sonic.EXE is supposedly a demonic entity possessing Sonic.
 * He has multiple attributes of a demon, furthering the idea of possession. He has a claws, bloodied gloves, limbs, shoes and torso. He has yellowed, sharp teeth and most importantly, black eyes and red pupils. He also can be seen crying blood.

Audio
Sonic.exe laugh