Question: While A Dark Room was originally published in mid 2013, how far back do Online text-based role-playing game date?
Sentence (from "AmberMUSH"): AmberMUSH, sometimes abbreviated as Amber or AM, 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".
Relevant evidence: No