Jedi Knight II
Jedi Knight II, Jedi Outcast is an OpenGL game that many have been waiting for. It has much improved graphics over its predecessor. It fully supports advanced shaders, as well as very high texture resolutions and effects. There is one demo included in the multi-player section that is good for benchmarking use.
Jedi Knight II shoots the Tyan to a slight lead, though not noticeable to the naked eye, it's still a win.