i have beaten both of the doom3 versions and i think the doom3 pc version is better becuse it has better graphics and more stuff and better stuff in the maps. i dont really get why the pc version has more and better stuff. i think that when swiching to xbox they should have just cept it the same and at least worked better on the graphics. alothough the xbox version has great co op play but there is probebly a mod for pc co op play. but i have to say co op in doom3 even beast both halo and halo2. the reason i write about this is becuse i just beat the xbox version a couple minuetes ago. i think that the pc version is alot better than the xbox version. i still wosh they had not changed it on xbox. thats why i only bought the pc version.