Farcry is an FPS so basically any game in the FPS genre will be like it. For free games, I've gotten to like War Rock. Battlefield 2142 is a great game. As well as Counterstrike: Source. Unreal Tournament 2004 is a very good one, with several mods that make it even more entertaining, but that one is a little old. If I were to buy an FPS game...BF2142 would be it, it has alot going for it.
thats basicly something i cannot agree with tbhThere are quite some different types of FSP's. doom 3 and quake 4 ets are those, charge-in-and-kill-anything-that-moves FPS's. farcry is an FPS you cannot beat when you're playing like that. But if you liked farcry.. i think you would like Medal of Honor: Pacific Assault too.
and one game you should really consider fiving a shot would be Halflife 2its really good