I have played doom for as long as i can remember, i dont know technical things about how the games are made, all i know is doom is the best game i have ever played period. doom3 is one of the most scary games ever made, im not an XBOX shabiki but i spent close to five hundred dollars just to play doom3 and to this siku its the only game i have for xbox, the "doom3 collectors edition tin case" vol 1,2,3. fuckin A. i heard somthing about a part 4 coming out and its going to be on every system! i cant tell wewe how excited i am, i would like to thank id software for everything they've created and influenced in the gaming world. your the best....