I have unlocked every single skull related achievement in the MCC yet Throne of Bones is still stuck at 97% for some reason. That said, I checked my service record on the forum and it says that I have unlocked 40/41 skulls. I have no idea which one I have missed, and there is no way to tell without going back through all three games all over again to pick them up. Does anyone know how to find out through the service record exactly which one I am missing? It would be even more of a pain to go back through Halo 2 on Legendary to find these…
If you look at your service record on Waypoint there is a section that lists all your achievements.
You can look at the achievements for each game separately, and usually all the skull achievements show up together. If you look through all these you might find one you are missing?
Same boat, have got all individual skull achievements and all halo ce skulls, 2 and 3 achievements but not this one. I remember 1 skull that didn’t pop the achievement till about 3 days later so went and got it again but still not getting the throne of bones achievement