Plot: Ultima Online is a fantasy massively multiplayer online role-playing game released on September 24, 1997 by Origin Systems. Set in the Ultima universe, it is known for its extensive player versus player combat system. Wikipedia
Plot: Ultima X: Odyssey was to be a massively multiplayer online role-playing game based in the Ultima universe, developed by Origin Systems for Electronic Arts. Wikipedia
Plot: Lord of Ultima was a free-to-play, browser-based, massively multiplayer real-time strategy video game by Electronic Arts. The game started a beta test on April 20, 2010 and was developed by EA Phenomic. Wikipedia
Plot: Ultima: Worlds of Adventure 2: Martian Dreams is a role-playing video game set in the Ultima series, published in 1991, and re-released for Windows and Mac OS via GOG.com in 2012. It uses the same engine as Ultima VI, as did the first Worlds of Ultima game, The Savage Empire. Wikipedia
Plot: Akalabeth: World of Doom is a role-playing video game that had a limited release in 1979 and was then published by California Pacific Computer Company for the Apple II in 1980. Wikipedia