25-10-2005, 08:56 PM
On the Xbox (not sure about PC version) you do not need Doom 3 to play Doom 3 RoE as RoE is a different game. The campaign story in RoE takes place 2 years after Doom 3's campaign story. RoE has improved multiplayer, a couple new weapons, and a totally new campaign mode. On the down side it has no co-op mode which is one of the best features of Doom 3.

