PlaneShift is a cross-platform fantasy MMORPG in development. As of 2003, it was the first FOSS MMORPG to reach 100,000 registered user accounts. Client software is available for Linux, Windows and Mac OS X. It is a no-budget project produced by a group of developers, founded by Luca Pancallo, and guided by the Atomic Blue non-profit organization, bandwith for the servers is completely donated by sponsors. The server side engine code is completely written from scratch by the PlaneShift team, while the 3D rendering features are based on the Crystal Space 3D engine. The game engine is released under the GPL. The content is released under a proprietary license.