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Ultima Underworld: The Stygian Abyss is one of the first free-roaming first-person 3D ARPG (action RPG) ever created. The Stygian Abyss is the dungeon of the same name, part of the land of Britannia, and it's set in the Ultima universe created by Richard Garriott. Ultima Underworld was designed by Paul Neurath, developed by Blue Sky Productions and released by Origin Systems in 1992. It was followed by Ultima Underworld II: Labyrinth of Worlds.