One of the most intense shooters i've ever played.
Graphics
The graphics in FEAR are definitley more impressive than Doom 3. Light sources cast excellent shadows. Objects fly through the air as the room is ripped apart with bullets and explosions. When the game goes into slow motion, you can see the bullet trails as they rip through the air leaving impressive trails as they impact into your enemies resulting in puffs of blood being sprayed everywhere.
Sound
The sound in this game is excellent. From voice acting to objects being thrown around by gunfire, it all helps immerse yourself in the experiance.
Gameplay
The Artificial Intelligence in this game is impressive. They act as a squad, track your movements, flank you, and will kick your butt many times. When you're not in intense firefights, you investigate strange paranormal activities occuring all around you. These scares are way more effective than Doom 3's closet monster tactics.
Conclusion
If you like a great single player FPS, get this game!