Legendary Completion Achievement not unlocking (co-op)

Games Halo Infinite
1

Hi there,

Me and a friend recently played through everything co-op on Legendary.

We used our previous ‘Finish the Fight’ saves that we’d completed solo on Normal/Heroic but upped everything to Legendary.

Last night we finished the last level but nothing popped.

As I browse around the map, everything is showing as Complete on Legendary (every main mission and side mission) but the game doesn’t seem to have recognised it.

Is there anything I can try or is there anything I did wrong? Maybe replaying multi-level missions? Did I need to start a fresh save just for this? (I really hope not!)

2

Was this a save file from before the November update? If so, then you’ll likely have to do it again on a new save. Others had this problem with the LASO achievement, when using an existing save file.