an internet text-based role playing game
http://www.endless-online.com/

City of Villains is a massively multiplayer online role-playing computer game based on the superhero comic book genre, developed by Cryptic Studios and published by NCSoft. Released on 2005-10-31 (Halloween), the game is integrated with their previous release, City of Heroes. The gameplay centers on defeating a variety of computer controlled opponents within a three-dimensional world using various powers and attacks, sometimes with the help of several other players
http://eu.cityofvillains.com/

NEXUS: The Kingdom of the Winds (Korean:바람의 나라), alternately known as Nexus TK or simply Nexus, is a Pay to play MMORPG, currently run in the US by Kru Interactive. Nexus began as a U.S. version of the Korean game 바람의 나라 (Baramue Nara, or simply Baram) developed by NEXON Inc. of Korea, and is loosely based on Korean mythology and on a series of graphic novels by an artist named Kim Jin. Development of Baram began in Korea in 1994 and the game was released in 1996. One year later, it also entered Beta in the United States, going commercial in 1998. In 2005, the US subsidiary of NEXON changed its name to Kru Interactive and took over running Nexus, Dark Ages, and Shattered Galaxy as an independent company. Most of the employees of the subsidiary were laid off but the management remained the same as it was when the company was a subsidiary of NEXON
http://www.nexustk.com/index.html

Kingdom of Loathing (KoL) is a humorous, browser-based, multiplayer role playing game, designed and operated by Asymmetric Publications, including creator Zack "Jick" Johnson and writer Josh "Mr. Skullhead" Nite.

EverQuest® II is the next generation of massively multiplayer gaming, a huge online world where friends have come together for adventure and community. Featuring breathtaking graphics and a vast, beautiful and dangerous game world to explore, EverQuest II sets the standard for graphical realism as players are immersed in the game's exciting locales and mysterious lands.
http://www.everquest2.com/