there's no truth behind the theory that some games increase the chances of a RRoD. If the system is defective, then it's defective. Not all systems are borked, but enough to be a problem. A vast majority of 360s will never RRoD, the failure rate is below 25%.

Though, i'm getting a bit tired repeating myself. I've expianed the RRoD situation in detail in about a dozen different threads.