WARNING DO NOT BUY THIS GAME. I bought this when I upgraded my PC to windows 7 and had been wanting to play it but couldn't because I was using XP. When it arrived I went and installed it first thing. It installed fine and accepted the key. But when I went to bring up windows live for games it said my key is invalid and to re-enter. I did this several times with no luck. I called Microsoft support and they told me the key I had was already in use and that they no longer support this game and to figure it out myself.This is completely unacceptable. If you are going to put DRM in a game you should always support it or stop selling the game. So in sort what Microsoft told me was we got your money, too bad #@$% off.I will never buy a Microsoft made game. I was thinking of buying a X-box, but now that is never going to happen. When the PS4 comes out I will go with it instead.