15 More Video Game Glitches That Became Gameplay Features

DEMON AI FRIENDLY FIRE – DOOM

Remember how in DOOM you could actually trick monsters into helping you out by making them fight each other? Yeah, that wasn’t really part of the original game itself. At any time in the game, if ever one monster accidentally hit another, they would actually turn on each other and start fighting each other. Though it would go on to become a commonly used tactic by many players, it was originally just an AI bug that the developers really liked and decided to keep in the final game.