Me and my friend have been playing halo 2 for 3 hours now and haven’t passed the 1st mission. We are trying to beat halo 1-4 on legendary. We completed Halo 1 without a problem but every time we get to the end of the mission the game lags out. We have contacted Xbox support and there is nothing they can do. Nothing is wrong with our internet connection either both NAT types are open. PLEASE HELP !!!