Ancient Domains of Mystery (ADOM) is a roguelike video game designed and developed by Thomas Biskup, who first released it in 1994. The player's goal is to stop the forces of Chaos that invade the world of Ancardia. Biskup ceased development of the game for nine years, but revisited it in 2012. He also resumed work on a sequel, Ancient Domains of Mystery II. Biskup first made an updated version of ADOM available to sponsors of his crowdfunding campaign. Later versions, beginning with v1.15.2.r60, he released on the Web and through digital distribution services.