Plot: Island of Kesmai was an early commercial online game in the MUD genre, innovative in its use of roguelike pseudo-graphics. It is considered a major forerunner of modern MMORPGs. Wikipedia
Plot: Meridian 59 is a 1996 video game developed by Archetype Interactive and published by The 3DO Company. It was the first 3D graphical massively multiplayer online role-playing game and one of the longest running original online role-playing games. Wikipedia
Plot: LegendMUD is a text-only MUD game founded by a group of friends including virtual world designer Raph Koster. It features historically significant story elements and award-winning gameplay. It opened publicly on February 14, 1994. Wikipedia
Plot: DikuMUD is a multiplayer text-based role-playing game, which is a type of multi-user domain. It was written in 1990 and 1991 by Sebastian Hammer, Tom Madsen, Katja Nyboe, Michael Seifert, and Hans Henrik Stærfeldt at DIKU the department of computer science at the University of Copenhagen in Copenhagen...
Plot: The Shadow of Yserbius, originally published by Sierra On-Line and developed by Joe Ybarra of Ybarra Productions, was the first of three graphical MUDs for the online community. Opening to rave reviews, The Shadow of Yserbius, according to industry critics, set the standard by which all future MUDs...
Plot: MUD2 is the successor of MUD1, Richard Bartle's pioneering Multi-User Dungeon. Rather than a sequel, it is the result of over 20 years of continuous development, and is still largely based on the game's original code. Wikipedia
Plot: The Realm Online, originally known as The Realm, is a massively multiplayer online role playing game launched in December 1996 for Windows PC. It was designed in the tradition of graphical MUDs, before the usage of the terms massively multiplayer and MMORPG. Wikipedia
Plot: Achaea, Dreams of Divine Lands is a roleplay-focused, text-based multi-user dungeon released on September 9, 1997. It was published by Achaea LLC, now known as Iron Realms Entertainment. Wikipedia
Plot: LambdaMOO is an online community of the variety called a MOO. It is the oldest MOO today. LambdaMOO was founded in 1990 by Pavel Curtis at Xerox PARC. Now hosted in the state of Washington, it is operated and administered entirely on a volunteer basis. Wikipedia
Plot: Dark Age of Camelot is a 3D massively multiplayer online role-playing game, released in October, 2001 in North America and in Europe in January 2002. The game combines Arthurian lore, Norse mythology and Irish Celtic legends with high fantasy. Wikipedia
Plot: Colossal Cave Adventure is a text adventure game, developed between 1975 and 1977 by Will Crowther for the PDP-10 mainframe. The game was expanded upon in 1977 with help from Don Woods, and other programmers created variations on the game and ports to other systems in the following years. Wikipedia