tgmud
TGMUD is a MUD created originally for /tg/chan (now quest.lv) which is now a general MUD for both 4chan /tg/ and /tg/chan players.
There is very little overarching theme, with the main area being a hub network with portals to different areas.
Roleplaying is optional but it is generally considered fairly boring simply grinding.
IRC: #tgmud on irc.rizon.net