Dead Rising utilizes multiple cores and really strains the life out of the 360. If not in a well ventilated area it looks like the system is freezing up on some people.
The Dead Rising demo killed my launch 360, so it went back with the PRP. I guess Dead Rising actually uses more than one core at a time, and really tests your 360's cooling system. I predict more 360's will fry because of Dead Rising. Because, you know, nobody @!$%#s with the undead.
If any 360-hq members are experiencing issues with this title please post about it in our forums..