"John Carmack made some really good decisions in architecting the engine for scalability. We knew that PS2 and Gamecube were out of the question due to particular graphics requirements (global illumination, normal mapping, shadow volumes etc.), but we knew Xbox had a shot. The key concerns were memory and performance. With only 64MB RAM on the Xbox and a 733Mhz processor, we knew it would be quite challenging –- but not impossible. The team here was really excited to be working on this project -– a chance to work on Doom! -– so we were definitely going to take it on and prove that a great Xbox version could be made. Now, after many months of development, I think it’s safe to say that players will be stunned when they see the type of graphics fidelity that Doom 3 is able to present on the Xbox."