I have played and completed all the campaigns in the MCC, however in Halo 4 the status shows that each mission was completed on Legendary but Mission: Infinity didn’t unlock the achievement and the nameplate completing the game Legendary in Halo 4 and All the Halo campaigns together didn’t get unlocked. Its like some kind of bug in the game. I played Mission: Infinity again on Legendary just to see if it would unlock somehow properly but nothing happened (waste of time). Does anyone else have this issue? Is there a solution to this bug? Please 343, fix this problem.