Doom II spoiler for a game from 1994, so i think we're fine. On the last level (MAP30, the Icon of Sin), you beat teh boss by firing rockets into an exposed spot in the giant demon wall.
Whats behind it? If you use the noclip cheat (icdlip) in single-player and walk through teh wall, you find teh boss is actually a picture of developer John Romeros head on a stick lol His teammates put it there.
His response: he recroded the Icon of Sins demonic speech, which is a reversed recording. Played forwards, its him saying u must kill him to win the game. Legendary.
