High Quality Content by WIKIPEDIA articles! Armageddon, frequently abbreviated Arm, is a low fantasy MUD — a text-based online role-playing game — set in a desert world called Zalanthas. It was founded in 1991 by Dan Brumleve, Nasri Hajj, and Santiago Zorzopulos in Urbana, Illinois. It requires its players to focus on role-playing, and is a seminal example of the Roleplay Intensive MUD, or RPIMUD, style of game.