Wikipedia
GodWars
GodWars is a family of MUD engines derived from Merc, created in 1995 by Richard Woolcock, also known as "KaVir". GodWars' setting is influenced by White Wolf's World of Darkness.
In 1996 the code was illegally released and advertised on a website for free download. After fighting extensively to stop the illegal use of his codebase, Woolcock later released the code publicly.
The original GodWars was later renamed Dark City then Last City, with added wilderness code.
Since 2000, between 28 and 84 derivatives of the God Wars code have been active, including Vampire Wars, which is based on White Wolf's Vampire: The Masquerade and won the October 1998 Mud of the Month award at The Mud Connector.