Mailing the story:

Widelands is an open source (works on Windows, Linux and Mac OSX) real-time strategy game, built upon the SDL and other open source libraries. If you knew Settlers I & II (Bluebyte), then you already have a rough idea what Widelands is all about because Widelands is heavily inspired by those two games. It has single-player, network, internet multiplayer modes and single player campaign missions. Players may select one of three different tribes. Widelands provides two tutorial missions. Advanced players can create their own maps with the included map editor and it is also possible to import and play original Settlers II maps.