Summary: Doom 3 was released for the original xbox. All that they did for this one was tweek some light effects and other small things. If you played it for the original xbox then there is nothing new for this one. The thing that makes this game worth it is the fact that you get a voucher for the first and second doom from the pc. Also you get all the DLC for doom 3 plus a DLC that was never released. So all in all it is a good by for $40.