DPIKmud
DPIKmud is a MUD (Multi-User Dungeon) game that primarily uses individual hacker's (hack) terms in its internal commands and protocol. The game's development began in 1999 and continues to the present day. Its primary designers were Dodge, Pokebuster, and Impromptu.
DPIKmud is designed to be written in Perl and has become a standard reference model for MUD
The primary goal of CPIKmud's design was to cater to players and MU* owners creating simulated environments
Those with knowledge of Perl can run a server for the game, with scripts and mods found