Amazing. If your computer can run it, buy it, now.
The gun play is above average and fairly innovative. Environments are highly destructible and enemy reactions to taking fire are very realistic (wow the nail gun is fun).
The AI is THE best to date for an FPS. The game is very hard on even the normal setting, in fact, if it weren't for the slow-down ability, the game would be practically impossible. The react to your strategy, create their own cover, and use each other tactically. I have trouble explaining it because it's a notch above any other game out there.
Wow, a good story for an FPS. Probably the first since HL2. The game gives you bits and pieces to the story, little bit at a time. This keeps you interested, but also in the dark at the same time. I'm still not quite sure what to think of the ending, only that it seems to create more questions than answers.
Graphics: F.E.A.R. looks absolutely amazing. The game is very dark and the shadows are done superbly. I would have given it a 10 for this category, if the game were not so hard to run. To run it on max settings and get the 60 fps that many PC gamers desire is extremely hard. You will probably need a 512 mb card, such as the Geforce 7800. Also, if the rest of your PC isn't up to scratch (you'll need a gig of RAM as well) you may actually need 2 gpu's.
Sound: If you don't have a good soundcard and plan to buy this game, do yourself a favor and pick up one. The game sounds beautiful, I can't say enough good things about it. Half the reason the game is so friggin' freaky is because of the excellent audio.
Value: The multiplayer isn't Cs quality, but has entertained me for a while. Also, the single player is good enough to merit a second (maybe a third, who knows?) play through on a higher difficulty.
Tilt: The immersiveness of F.E.A.R. certainly merits the 10 score in this category. If you've got a PC that can handle this game, you NEED to play it.