Wikipedia
AmberMUSH
AmberMUSH, sometimes abbreviated Amber, was a MUSH — a kind of online text-based role-playing game — based on The Chronicles of Amber by Roger Zelazny and, to some extent, the Amber Diceless Roleplaying Game. Founded in 1992 by Jennifer "Jasra" Smith and several associates, it operated until 2009, remaining online for 17 years.
In the 1990s, AmberMUSH was noted as one of the most popular examples of the MUD genre.