The game offers campaign, multi-player, and single-player skirmish modes. An extensive tech tree with over 400 different technologies, combined with the unit design system, allows for a wide variety of possible units and tactics.
Warzone 2100 was originally developed as a commercial game by Pumpkin Studios and published in 1999, and was released as open source by them in 2004, for the community to continue working on it.” source: wz2100.net
“In the late 21st century, the world’s civilizations are wiped out by a series of nuclear strikes, seemingly caused by a massive malfunction of the new NASDA strategic defense system.
While most of the survivors form scavenger bands to survive, the player is a member of a group named “The Project”, that is more organised and seeks to rebuild civilization using pre-war technology.” source: wikipedia.org