I'm running off of a three-month old x-box, never modded, purchased from Best Buy and used (off and on) w/ Halo2 on live-- it's definitly not modded, or MS would have kicked my account. I'm running a disc purchased (at full retail price, BTW), also at Best Buy last week. No scratches on the disc, nothing wrong w/ the x-box, and after the merc attack on Dantooine the game loads to the infamous black screen. Very, very annoying. I would have been more than happy to wait until February or March to get a game that worked, and didn't die seventeen hours in.