I have completed all missions in Halo 5 in single and Legendary mode, even in the settings i can see that every single mission of the campaign is completed at least one time at the legendary level. Every achievement like “complete mission 1, 2, ecc” are unlocked but no one of the achievements as “complete the campaign at normal, eroic, legendary” are unlocked. I tried to complete some missions another time (at legendary level) but this doesent change.
Yeah, I’ve still got this same issue. I’ve read it may be related to if you were online at the time of some mission completions, so does anyone know of a way to check which mission has a discrepancy? I’m sitting at 93% for the achievement, but that does nothing if all the missions say they’ve been completed solo. I really don’t want to do all missions over again on Legendary.