I got mine today, I always put my xbox on 'Go Offline' in Settings > Network then install the game. If you 'Go Online' after you have downloaded it you will need to download the 9GB Patch whens starting up the game. You can stay offline and worry about the day one patch later, this is only because if you download the patch you still have to put your network settings 'Offline' to play the game after download. The game will not allow you to play campaign when your xbox is 'Online' so obviosuly you cant play online yet either. Another thing is that achievements cant be unlocked at this moment. Other than that you can play the campaign just like I am, im on mission 11 already lol.. the game is amazing!!!!