Purple Mountain III: The Feasting is a Pathfinder Roleplaying Game compatible module designed for four 3rd-level characters that uses the medium XP advancement track. Play it in any campaign setting with a mountain-based megadungeon, or as a stand-alone dungeon with a mega-dungeon feel.
Purple Mountain III: The Feasting combines the combat and daring-do of exploring dank, mysterious tunnels with the fascinating interaction of a 'sandbox' underground community! Vicious underground dwellers, forgotten shrines to a dark god, ancient curses threatening to wipe out whole races- all give your party a chance to shine, and make a little coin doing it!
The Purple Mountain series is designed to be a classic mega-dungeon. You know the kind...
It doesn't have a grand plot or even a consistent theme level to level. Instead, it has pathways to the subterranean realms, prisons for demons, ancient ruins, lost civilizations, legendary weapons, mysterious magic, mines, slave pits, elemental nodes, water-filled passages, mazes, trick doors, traps, haunted levels, classic monsters (ropers, trapper, mimics, otyughs [especially otyughs], owlbears), dragons, monsters too big to have ever fit down those hallways, and artifacts!