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 that players contact the administration in an application phase before actually playing. The head coder of Armageddon is Morgenes Ercestras, who ran a popular Merc-derived MUD called Aldara III.
Armageddon's setting began with a heavy influence from Dark Sun, Dune, and other fantasy and science fiction sources, such as The Morgaine Stories by C. J. Cherryh, and Robert Asprin's Thieves' World, but has since grown and evolved. While some of these elements are still part of the campaign, ongoing development is not focused on maintaining a commitment to those influences.