I wonder if Doom 3 will support cooperative play like Doom 1 and 2? That was one of the coolest features of the game and the ONLY game to have fun cooperative play. Not many games have ever supported that. Half Life 1 has a mod for it but you dont get to play the regular levels, but instead just custom levels. In Doom 1 & 2, cooperative play was played on the same levels as single player games.