I recently completed mcc halo ce on legendary and did not receive the achievement for finishing all the missions on legendary or credit for one of the missions. How does one get this fixed?
This happened to me in H2 MCC and the way I did it was I had to go to the career section, then achievements, then H2 and find the missions that I didn’t receive credit for completing and choose them there. After I started the missions that way, I got credit for completing them and the achievements for finishing the game as well. I haven’t been able to figure out a way to force them to register without doing the missions more than once (it took me three times to get one mission to finally unlock).
According to Waypoint, your Two Betrayals stats didn’t count. I’d recommend trying to play this mission on Legendary again. Unfortunately, that’s about all you can do for now. Sorry about that.