I've been having an issues with my campaign freezing during Infinity level. Always at the part where you get to the big door after going through the forest where Cortana says the she detects friendly signatures. The screen goes black like it's going to a cut screen but it just stays black and the music cuts out. You can press pause and the pause menu comes up, so does the xbox guide, but if you try to go save and quit the whole system freezes and you have to hard reset the system. I've tried it with both the game installed and uninstalled. So thinking it was the disc I took it to walmart to exchange it. New disc same problem, even tried reinstalling the game and starting from the beginning of the level with no luck. Anyone else having this issue? I'm using an old model xbox with a 120 GB hdd, but haven't had a problem with any other games.