I have a 2.4ghz P4, 1GB of Ram, and a 6800GT oc'd w/ latest drivers and FEAR still makes my computer Crap a brick graphics wise. They can do much better than that when Republic Commando looks twice as good and runs beautifully.
Aside from that, the actual gameplay wasn't all that inspiring for me. I just didn't get drawn into the game all that much, and it doesn't really seem like you can take advantage of your environment while playing. It tries to be a stealth horror FPS but lacks solid stealth, horror, or FPS aspects IMO. Also the weapons seem clunky and uninspiring.
As far as farcry goes... I just got bored of it after about 1 hour... not sure why. I have the game installed but have about zero inclination towards ever finishing it.
Games I do like include:
Q3 Multiplayer
Unreal2k4
Half-Life 2 Single player
Splinter Cell 1 & 2 (I didn't buy SC3 because UBIsoft used StarForce copy protection on it)
Star Wars Republic Commando and Jedi Academy & KOTOR 1 & 2
The Age of Empires Series of games
Master of Orion 1 & 2
Serious Sam 1 & 2
Nox
Daggerfall and hopefully the upcoming Oblivion Sequel