id’s post-apocalyptic open-world shooter Rage (PC, PS3, 360, Mac) will look worse on Xbox 360 due to the compression needed to fit the game’s assets on two DVDs, programmer John Carmack revealed at tonight’s QuakeCon keynote.
According to Carmack, the royalty fees to include a third disc in the Xbox 360 version would be so high that it simply isn’t a feasible solution, with the programmer hoping for Microsoft to make a concession. He stressed that the issue is merely a storage problem and has nothing to do with the power of the Xbox 360 hardware, while adding that the PlayStation 3’s Blu-ray format is Sony’s one leg up on the competition.
Carmack also noted his belief that neither Doom 4 or Rage will be digitally distributed online, as id isn’t looking into that sort of distribution for its major titles at this point.

Ok John, what about installing games on 360’s HDD to improve performance and minimizing loadings? Sounds weird, because Microsoft said you will be able to install games on your HDD, and it’s not joke. Why don’t you use this? Just like optional features, wanna get less loadings and more stable framerate - install game like you got PS3, don’t want or don’t have free space - play regular DVD’s with bigger loadings and less stable framerate?