Quién hizo a quién: id y Epic

id Software : Doom, Doom 2, Quake, Quake 2, Quake 3, Doom 3, Doom 3: Resurrection of Evil

Epic Games : Unreal, Unreal Tournament, Clive Barker’s Undying, Unreal Tournament 2003/2004, Unreal 2, Unreal Championship, Gears of War, Unreal Tournament 3