From publisher blurb: The Forgotten Burial Vaults is an adventure for 7th to 10th level characters directly compatible with most OSR rule sets and easily adaptable to the rest. It is set in a 25 room dungeon complex, and like other modules in the HS series, mostly focuses on monsters (a mix of standard and new ones taken from open sources), not puzzles or traps. Common sense, though, is a must as not every inhabitant is worth fighting and some can even be friendly.