The Co-president of Naughty Dog Christophe Balestra, has recently stated . ?I guarantee that this game couldn?t be working on Xbox 360. It would be impossible. I?m 100 per cent sure of this. ?You can play the entire game without loading. We don?t require an install. We?re doing all the post-processing effects on the SPUs [Synergistic Processing Units]. The quality of the depth of field we have, you can?t do that on the Xbox.? Full Story http://www.product-reviews.net/2009/08/27/ps3s-uncharted-2-impossible-on-xbox-360-naughty-dog/ I'm not anti xbox , maybe a bit of a fanboy , but its nice be reminded the extra cash for my ps3 was justified .