UTron - For use with the Unreal Tournament game. TRON elements are recreated in the unreal game engine. Forum, gallery and surveys available. [Windows] - http://dynamic4.gamespy.com/~utron/
Vektor Space Home - School project, a 3D multiplayer lightcycle clone. Movement is no longer angled at 90 degrees. Screenshots and artwork available. [Windows] - http://www.vektorspace.com/
NaniTron - 3D clone of the classic TRON lightcycles game. Screenshots and source code available. [Windows] - http://www.ludd.luth.se/~mdr/soft/nanitron/
Armagetron - A faithful multiplayer Tron lightcycle clone, 1 to 4 players. 3D view, adjustable camera angles, source code available, GPL. [Windows, Linux, Mac] - http://armagetron.sourceforge.net/
Cycles3D - 3D multiplayer Tron clone, 1 to 6 players. Source code available, GPL. [Windows, Linux] - http://www.cycles3d.com/
GLTron - 3D multiplayer motorcycle combat, inspired by the movie Tron. Source code available, GPL [Windows, Linux, Mac] - http://www.gltron.org/
Lightcycles - A 3D single player Tron clone. Includes first person view, overhead view, 3/4 view. Strong AI. [Windows] - http://website.lineone.net/~planetride/lightcycles.htm
Super Cycle Arena - A 3D single player Tron lightcycle game. [Windows] - http://www.krunchopia.com/?page=sca