The original Doom 3 on the Xbox had online co-op for the full campaign, this version has been reported to have a co-op mode but not confirmed it's for the full campaign. My advice is to just buy 2 copies of Doom 3 for the Xbox at a cost of under £5 for both and play system link on the xbox 360. |
As for enhanced graphics, they maybe enhanced compared to the original Xbox version but not compared to the PC version.
#8912507, By Doom 3 BFG Edition