Gunderholfen is a massive Old School Renaissance (OSR) mega-dungeon and mini-campaign setting created by G. Hawkins, primarily designed for use with OSRIC or 1st Edition systems. The main book is approximately 400 pages and details a 10-level dungeon beneath the city of Longfelt. Core Resources
Separate PDF "Packs" are often available to help GMs manage the sheer volume of data during play: gunderholfen pdf
Rules for a new priest class, 18 new spells, and dozens of unique monsters and magic items. The Lore: From Dwarven Fastness to Chaos Lair Gunderholfen is a massive Old School Renaissance (OSR)
The dungeon’s history is layered, reflecting its long transformation. Originally a dwarven fortress, it later became the prison of a tyrant where inmates were forced to excavate their own cells. Following the tyrant’s fall, various factions—including warring prison gangs, cultists, and goblinoids—claimed different levels. Gunderholfen - G. Hawkins - DriveThruRPG Core Resources Separate PDF "Packs" are often available