An online MMORPG, Dark Sun Online: Crimson Sands, was released in 1996 and hosted on the T.E.N. Network.
It was released for DOS in a somewhat unfinished state in 1993 by Strategic Simulations, Inc., and later patched to a more workable version.
It was later re-released on CD-ROM as part of the AD&D Masterpiece Collection in 1996.
Based on the campaign "Dark sun" of the pen and paper RPG "Advanced Dungeons & Dragons".