Imperian

DragonRealms is a fantasy MUD created by Simutronics in 1996. It has fallen in popularity with the rise of graphical MMOs, but is still one of the most popular MUDs today.

Gemstone IV is a text-based online roleplaying game developed by Simutronics and launched in November 2003. It is the fourth iteration of the on-going Gemstone series.

Knight Online is a PvP-centric Massively Multiplayer Online Role Playing Game that has been under continuous development for almost a decade. Two nations: El Morad and Karus - or more colloquially, humans and orcs - are locked in an eternal struggle for dominance of the Adonis Continent. The PvP in Knight Online is fast-paced, action-packed, and oftentimes frantic. Dozens of players can be seen clashing in PvP zones during all hours of the day. With events such as Lunar War and Castle Seige War, the action becomes massive! While PvP may be the beating heart of Knight Online, much of the game is spent embarking on quests, killing monsters, and - of course - collecting loot. The Upgrade System lets players tempt fate in an effort to improve their existing weapons, armor, or accessories (or lose them in the process!). With its unique ability to let players refine their skills and build their characters and equipment, Knight Online is able to entertain and excite its fans even after many years. Pick a side, build up your warrior, and join the fray!

Embers of Caerus is an indie first-person MMO depicting an original low-fantasy game world, developed by Forsaken Studios

This is an MMORPG by SubGlobal, inc. in North America.

Aetolia is a multiplayer RPG (role-playing game) set in a gothic-fantasy world. Aetolia is played entirely in text with minimal graphics. Characters in Aetolia talk, trade, fight, plot and even kill and eat each other. They roam the continents and explore dungeons, killing (or helping) foul creatures, gather gold and treasure while increasing in power and prestige. Unlike other fantasy settings, Aetolia enables you to play characters of all alignments and creeds, and it's entirely in the hands of the player whether to become a hated villain, vaunted hero, or anything in between.

Starmourn is a science fiction themed MUD. The sixth MUD released by Iron Realms Entertainment and the first in 9 years. Players create characters, explore the universe, and participate with other users in a variety of ways including PvP, PvE, roleplay, politics, economics, and more. Users play Starmourn through a proprietary, cross-platform client, directly in their browser, including Android and iOS.

Lusternia is a text based multi-player game (sometimes called a MUD). When you create a character and log in, you join adventurers from all over the globe who will share in the trials and tribulations found only through intensive roleplaying. Some dismiss text games as retro, but many others find nothing can compare to the dynamic experience hearkening back to pen and paper RPGs.

The predecessor of RuneScape Classic, today unplayable unless you have access to JaGEx headquarters.

Harmonia Tactics is a realtime turn-based tactical MMO heavily inspired by the Shining Force series. Players assemble teams from 8 different character classes and collaborate to save the kingdom of Harmonia from the forces of The Dissonance.