Not only does Tribes 2 add a single-player element to the multiplayer FPS, but also new weapons, levels, play modes, characters, vehicles, as well as a new engine allowing for real-time weather including wind, rain, fog and other effects. While Sierra released Tribes 2 for free in 2004, it closed down the multiplayer servers in Oct. 2008, leaving long time fans out on the cold, until now. TribesNext has put up its own server and issued a patch to remove the CD key and enable multiplayer functionality.