Warzone 2100 is a real-time strategy game, developed by Pumpkin Studios (Archived website) and published by Eidos-Interactive. In late 2004 Warzone was released by its copyright holders, Eidos-Interactive, to the public under the GNU General Public License and the Warzone 2100 Resurrection Project was born.

Although comparable to Earth2150 in many significant aspects, it does contain some that are unique. These include various radar technologies, a greater focus on artillery and counter-battery technologies, more frequent in-game cinematic updates as gameplay progress, as well as a different vehicle design method.