Warzone 2100 is a real-time strategy game, developed by Pumpkin Studios and published by Eidos-Interactive™. Although comparable to Earth2150™ in many significant respects, it does contain aspects 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. It was released in 1999 for both PC and Playstation®.

In late 2004 warzone was released by its copyright holders, Eidos-Interactive™, to the public under the GNU General Public License (GPL), and the Warzone 2100 Resurrection Project was born.