Originally Posted by Donut SD
I did quite well on legendary doing a run through. And then for some reason my Xbox decided it didn't want to save my game....grr...I got into the forerunner planet before I had to shut down. Load up next day and there was no campaign progress. At least it was still pretty early on.
Was it alone or in co-op? Noticed myself that co-op save points weren't registered, but since the chapters were unlocked it clearly registered having played those levels. Weird.