Conquest is a real-time, multi-player space warfare game that was originally written in RATFOR for the VAX/VMS platform by Jef Poskanzer and Craig Leres. It was the early predecessor to Netrek. With
conquest version 8.1 or better, an OpenGL based client is provided as well, which looks a heck of alot better than the 20th Century curses interface it started with :). The object of the game is
...Licence : GPL 
Take our 
