Discover the ancient secrets of The Emerald Spire, a gigantic dungeon brimming with incredible danger and phenomenal mysteries! With 16 levels designed by a who's-who of gaming legends, including best-selling author Ed Greenwood, gaming icon Frank Mentzer, and Paizo's most prominent veterans, The Emerald Spire takes players on a deadly delve into the depths of this mysterious dungeon, its ancient levels each impaled by a mysterious green crystal. Starting at 1st level, novice adventures will rise from facing goblins and deadly traps to high-level battles with the clockwork soldiers of a lost empire and even a forgotten master of creation. Designed to be a complete dungeon-delving campaign, Pathfinder Module: The Emerald Spire Superdungeon features seven new monsters, a detailed description of the nearby settlement of Fort Inevitable, and the history of the Spire and the surrounding territory, which features prominently in the new Pathfinder Online massively multiplayer online game. A hardcover, 16-level, Pathfinder mega-dungeon designed for characters level 1-13.