Quick question. I played the campaign on legendary twice but the achievement has not popped. Waypoint shows that I have played and beaten all missions on legendary (https://www.halowaypoint.com/en-us/games/halo-5-guardians/xbox-one/service-records/campaign/players/xxdark%20druid) but still nothing.
I waited for a very long time (a year+) before replaying the last mission again. I found a few threads from two years ago, went through the restarting the xbox, clear game cache, etc. The only thing I have not done is completely uninstall the game and then reinstalled.
Just a little frustrating.
Thanks.
DD