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. Xconq is released as free and open-source software under the terms of the GNU General Public License v2.
Stan Shebs, Greg Fisher, Robert Forsman, Alain Brossard, Michael Peters, etc.