A Pathfinder Society Scenario designed for levels 12–15. Using misdirection and misinformation, the Pathfinder Society has cornered a pair of its old enemies—a demoniac and an assassin—in the Five Kings Mountains. However, the two have taken refuge inside a sacred dwarven burial ground sacred to Magrim, and their desperate defenses have stymied the dwarves’ initial assaults. It falls to a team of the Society’s best agents to overcome these obstacles, avert impending blasphemies, and end these villains’ treachery forever. Contents in Betrayal in the Bones also contribute directly to the ongoing storyline of the Grand Lodge faction. Written by Tom Phillips.

Players may bring their own level 12, 13, 14, or 15 1st Edition Pathfinder Society characters. Alternatively, they may play with 12th level pregenerated characters provided or characters of their own design. The Game Master will decide if changes need to be made to the character before allowing it into the game.