45 2 1Unlocked in the "History Museum", you'll need to collect 15 rocks to unlock this Ghost Story and achievement.Here is a video including ALL collectibles in this level:Showing only comment. Leave a comment. If you do manage to miss a collectible or two in the Museum, you can still go back and get it. I was able to, even after completing that portion of the story in the museum. Have no idea why people say you can't.Posted by PhoenixKurogane on 15 Oct 16 at 23:11 Leave a comment