To those who don’t know (is there anyone) MUD stands for Multi User Dungeon.
As a games genre, it has been around from the very beginning of on-line gaming, and almost from the beginning of multi-user gaming.
MUDs are predominantly multi-user text based adventure games: the type of thing that is now referred to as ‘Interactive Fiction,’ although that label is generally reserved for stand-alone single player games.
The term MUD was originally coined in 1978 by Roy Trubshaw; a student at Essex University, in England; who wanted to make a multi-user version of the ‘Zork’ text adventure games he had played on the university systems. Although Trubshaw wasn’t solely responsible for developing the game to the form it was most widely known, and played, in he did coin the phrase and lay the groundwork.
People will disagree about what exactly happened next, but arguably the MUD game got its first major break when it was released on the pre-internet subscription-based ‘CompuServe’ dial-up computer network.
Both prior to, and after, the commercial ‘‘CompuServe MUD’ release most MUDs were, and continued to be, run as hobbyist systems.
These hobby-MUDs were invariably run from Dial-up Bulletin Board Systems (or BBS for short) and although these were free to use accessing them often involved hefty call charges.