The Keepers of Lingusia: A classic Old School campaign setting released under Open Game License 1.0a and designed specifically for use with Old School retrogames (and Castles & Crusades in particular). Includes classes, monsters, gods, kingdoms of adventure and many, many hand-rendered Very Very Old School style maps. For gaming the way it was! Requires an Old School rule system to play (specifically designed for Castles & Crusades by Troll Lords Publishing but also easily converted for use with OSRIC, Labyrinth Lord, Legends of the Flame Princess, Dark Dungeons, and Swords & Wizardry, among others)