Abandonware games beginning with letter U sorted by popularity

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...

Ultima: Worlds of Adventure 2: Martian Dreams is an abandoned science fiction RPG designed by Jeff George, developed by Origin Systems and released in 1991 for DOS. Martian Dreams uses the Ultima VI engine to depict Mars in a top down perspective.