No Nameplates for All Campaigns on Legendary

No Achievements either… I just finished up Halo 4 on Legendary and did not unlock the gold nameplate for it. This should then unlock the platinum one as well. Is there anyway I can get this unlocked? do i have to go through the whole game again? I got the nameplates for CE, 2 and 3. just seemed like halo 4 didn’t register me beating it as well. If I go through the missions it says I have completed every mission on legendary.

i have the same problem with halo ce. Where the -Yoink- r u 343 get off your -Yoinks!- and get to work