I play Urban Terror :
www.urbanterror.net
Unfortunately, there aren't that many people playing online since it is getting old. It is a free mod for Quake 3 Arena. It was programmed by some guys that are true gamers. They built the mod for free and cannot accept money since it is ID software's game engine. I think they built it to be noticed and eventually land jobs. At one point it was the most popular multiplayer online. It is like Counter-Strike, but plays alot better and the maps are superior.
The Quake game engine by ID Software is far superior to the Counter-Strike Half Life program. Additionally, the new Counter-Strike game service called Steam is bullshit.
Even Lucasarts dropped development of 3d First-Person Game Engines because they realized the ID has the best and fastest real-time rendering and lighting. This is why they chose to license ID for the Jedi Knight series.
BTW, there is also a free mod for Quake 3 that is based on Drogonball Z called Bid For Power
http://www.planetquake.com/quake3/fe...motw/bfp.shtml
pretty fun
Meeyatch