true combat: elite
Be warned though, the learning curve is harder than FPS games like cod4 or halo 3. No crosshairs and an emphasis on realism. Its the polar opposite of a run and gun game. So your gonna die a lot in the beginning if your not used to creeping with ironsights or camping.
Because it is really made by volunteers, the game installation process isn't as clear cut as other games where you have one client and execute it and be done. But if your interested in playing, I'll help you out with it. You have to download wolfenstein enemy territory, download the patch, then download truecombat elite and finally the patch for truecombat. You also have to update punkbuster for wolfenstein so punkbuster doesn't kick you.
And the game servers are in europe so american players (like me) have a really tough time because having a high ping really really puts you at a disadvantage. Thats why I only play occasionally now. call of duty united offensive is where its at.