Douglas Buel

An official OSE supplement of demons, cults, and dark magic.

The City State of the Invincible Overlord is an epic collection of campaign resources for both 5e and DCC RPG. More than 800 pages of material, multiple poster maps, and a city’s worth of gaming!

A mega-dungeon that supports a full-year campaign. A legendary adventure considered by many to be one of the greatest of all time! Explore a thousand-year-old dungeon mystery waiting to be solved...

Warlock Knight is a programmed solo adventure for The Fantasy Trip for 32–34-pt characters. Battle strange monsters in the wild, explore labyrinths, face danger on the high seas, and meet brave companion in the always-dangerous Warlock Kingdoms of Sedra.

Beware of flying cows & the unstoppable Black Knight, this is the officially licensed quest for the Holy Grail!

The original book of old-school RPG traps returns for 5E and DCC RPG! A compendium of catastrophic traps, sinister snares, engines of evil, and deadly devices with with full game stats for a folio of fearful fates.

Make every encounter, adventure, and even campaign more engaging, memorable, and fun. From legendary D&D designer Monte Cook!