Xconq is an open source computer strategy game and game engine. First posted to comp.sources.games in 1987, it is notable as one of the first multi-player games to be released for the X Window System. It was for several years the only turn-based graphical war game available on Unix/X systems.
Originally a straightforward clone of Empire, later versions included the ability to define rulesets for different kinds of games, first using a Forth-like syntax, then a more powerful version based on Lisp syntax. It was also ported to other computer systems, including Macintosh, Amiga, and Windows.
Xconq is designed to be portable and re-definable. The default rule set is similar to Empire, but the rule set, graphics and maps can be altered to represent different time periods and strategic scales.
Example rule sets provided with the game include Napoleonic strategy, Beirut guerilla fighting, World War II grand strategy and Godzilla destroying Tokyo.
It can be played by multiple human or AI-controlled players over a network or via hot seat play.
Stan Shebs started working on a simple Empire clone in 1986, initially using Curses for its interface, then adding an X10 interface. He posted this