Ultima Underworld: The Stygian Abyss is a first-person role-playing video game (RPG) developed by Blue Sky Productions (later Looking Glass Studios) and published by Origin Systems. Released in March 1992, the game is set in the fantasy world of the Ultima series. It takes place inside the Great Stygian Abyss: a large, underground cave system that contains the remnants of a failed utopian civilization. The player assumes the role of the Avatar—the Ultima series' protagonist—and attempts to find and rescue a baron's kidnapped daughter.