BZFlag (an abbreviation for Battle Zone capture the Flag) is a three imensional first person tank shooting game. It was originally written by Chris Schoeneman for the SGI family of computers based on the classic Battlezone game. Current open source development is maintained by Tim Riker, and a team of project administrators. The project, including its source code and bug trackers, is hosted on SourceForge.net. While originally developed for SGI computers running IRIX, the game has been ported to Windows, Linux, Mac OS X, BSD, Solaris, and other platforms. It is distributed under the LGPL license, a switch from the common GPL license that it was under for many years.