Forum:Best FPS ever?

What would you, fellow wikians, say is the world's best FPS?

Mine is, without a doubt, Resistance. It's the only FPS that ever felt like a challenge to me, and the graphics and weapons are to die for. But that's just my opinion. What's your best FPS? Sgt. S.S. 20:30, November 11, 2010 (UTC)