Team, this has been happening since patch 1.04. Whatever changes you made have been causing the CPU to often overheat when performing combos. This is very frustrating, to say the least since combos are the most powerful and oft used attack. If this wasn't bad enough your latest patch 1.2.1 has made things even worse. Now the game will crash the Xbox simply during a loading screen to any mission or stronghold and at times during non-combo attacks. There should be nothing graphically stressing the CPU at this point, so what gives? So, whatever changes you have made yet again are causing the Xbox to overheat and shutdown. This is unacceptable and very frustrating. Please determine the causes and fix ASAP. This needs to be a priority on your part.