Check yer pwr supply voltages *at the board* first and make sure they are where they should be. That game uses a hard disc right? Your drive may be corrupted/failing. If it resets at the same place everytime, that says to me its looking for the next piece of code and can't find it. So the CPU detects the fault, it crashes, and the watchdog resets the whole works.
If I'm mistaken and it uses roms and not a HDD, reseat *all* of them. One or more may not be making good connection on 1 or more pins. You don't need to remove them from the sockets, just pry them up some on one end, push it back down and repeat for the other end.