Several levels in MCC (in Halo 2: A and Halo 4) don’t not unlock the achievements for completing them the first time I play through them, and require a second playthrough to unlock the achievement. This is not for par time or par score; just the basic achievement for completing a level on any difficulty. I didn’t experience this issue on any levels when playing through Halo CE: A or Halo 3.
It’s an issue between the servers and your Xbox. Your Xbox says you finished it but halowaypoint does not get the message so you have to redo all missions it does not pick up.
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> It’s an issue between the servers and your Xbox. Your Xbox says you finished it but halowaypoint does not get the message so you have to redo all missions it does not pick up.
This. Exactly. Ran into this issue a few times. Had to replay certain missions. Was it a bummer? Yeah. But it’s the only fix I know of as of now.