Ancient Domains of Mystery, or ADOM, is a roguelike video game by Thomas Biskup first released in . The player's aim is to stop the forces of Chaos that invade the world of Ancardia.

Like most roguelikes, ADOM uses ASCII graphics to represent the game world. Recent versions optionally can be played using tile based graphics, soundtracks and sound effects.It features a wilderness map that connects different types of dungeons. Most dungeons are randomly generated on first entering. Once visited, they — with the exception of the Infinite Dungeon — do not change when re-entered during play.