I generally wouldn’t make a thread for an issue like this, but I can’t seem to find anyone else on the internet having this issue. The achievement for unlocking the Boom skull in Halo CE won’t pop for me, and I can’t seem to resolve the issue. Every other skull in Halo CE unlocked along with it’s achievement just fine, but the Boom skull (second skull on the level Halo) won’t pop the achievement even though the skull shows as being unlocked. I’ve played the mission on normal, Heroic, and legendary, and also tried doing it on a different xbox and still no achievement. Normally I wouldn’t worry about this, but it seems like I’m the only person who’s run into this issue and don’t want to be locked out of perfecting this game. Anyone else have this issue?
How long has it been since you picked up the skull? It’s not unheard of for there to be a delay or a day, maybe even more, before an achievement is recognized.
I picked it up for the first time more than a month ago, A second time immediately afterwards when it did not unlock. Then about two weeks later, and then again two days ago.