Discworld MUD

The Discworld MUD is a free online [Multi-user dungeon] set on the Discworld as depicted in Terry Pratchett Discworld Novels. It is located at discworld.atuin.net.

Technical Stuff
The Discworld MUD was founded in 1991 and opened in 1992 to players by Pinkfish. It runs on a heavily modified LPMud Codebase, called the Discworld [MUDlib]] and is currently hosted at Ceres's House on a DSL Line, running on an Athlon 1.73G with 3 SCSI disks and 1.5G of RAM. The system runs Redhat Linux and Discworld uses the FluffOS driver (a fork of the LP MudOS driver)with the Discworld mudlib. Its player limit is set to 300 concurrent players (excluding creators).

It is a text-based game (No graphics whatsoever, beyond ASCII art) which requires a client to connect to it. There are many free MUD clients avaliable out there on the internet, but the official site also offers a JAVA Mud Client that can run through an internet browser.

Because the MUD has always been more focused on features than performance, this used to mean that LAG was legendary. However, with the advent of technology (or, at least, more advanced technology), the Disc is now relatively LAG free.