Much like the 360 game Condemned, F.E.A.R. uses dark, moody lighting to produce a creepy atmosphere. Nearly every area you enter is dark with the only light sources being fires, and a few dull emergency lights that cast dark shadows. The atmosphere produces several instances where you'll find yourself jumping at nearly every shadow - some imagined, some not. Environments also feature interactive aspects like realistically shattering glass and loads of particle effects. Even better, the A.I. is fully aware of these effects and will use them to its advantage.
Your first clue that F.E.A.R. has issues are the visuals. Compared to both the PC and 360 versions of the same game, the PS3 version comes up short. The creepy atmosphere is there, which is arguably the most important aspect of the game, though it simply doesn't shine - at least on a technical level. Texture work is extremely muddy and characters are a little blockier. There are even a few noticeable issues with shadows. Some light sources create them, while others do not.
The conversion over to the PS3 isn't all gloom and doom - especially when it comes to sound, which seems to have made the progression with no problems at all. Opposing troops will comment on your location and even react to your tactics and actions. It's one thing to have a friend tell you you're awesome, but when the in-game enemies do, it feels so much cooler.
Sound also helps to expand the game's creepy atmosphere. Most of the time the game is quiet, giving a little more impact to the roar of gunfire that breaks out during fire fights. There are also instances where you'll hear your heart beating.