The oldest continuously running graphical massively multiplayer online game and social virtual world still active today is Furcadia, which first opened its public servers on December 16, 1996. Developed by Dragon's Eye Productions and Catnip Studios, it holds the official Guinness World Record for the longest-running social MMORPG, allowing players to socialize and build custom user-generated worlds. In the realm of text-based multiplayer gaming, older multi-user dungeons (MUDs) like AberMUD and Essex MUD date back to the mid-1980s and maintain active communities, while pioneering graphical MMORPG giants like Meridian 59 (1995) and Ultima Online (1997) continue to operate dedicated live servers.