today i did the 3rd mission campaign on halo 4 coop with other 2 friend and we finished the mission but it didn’t give me the achievment of finishing the 3rd mission (as i didnt finished it before) and the achievement that says to finish any mission coop on heroic or harder.
it didnt even gave me the 3rd mission completed on xbox but on halo 4 stats it says that i already finished it…
could you please help me?