Well i finally got it working on my brothers comp cause mine is in the shop after exploding, here my review.
Ok firstly his comp is ok, it runs BF2 in low quality which makes him happy.
P4 1.7 geforce fx 5200, 764 mb ddr ram, and 27 gig hardrive.
Now they say that if u can run HL2 u can run fear right?
Of course they are right! This game ran like a dream till it came to well lit and shadowed areas then the fps dropped to 5 or so but returned to normal soon after.
All his settings were low so when i shot someone no blood, no gore, no nothing no particle effects on things i hit just a little spark and poof the mark wasn't even left.
When i tossed a grenade at someone it exploded on impact and the resulting dustball looked as if i shot a mummy, the only time someone bled was when a explosion beside them occured, when i shot someone with the plasma sniper it cause them to shrivel into skeletons and backflip while shooting, while it was cool it was also fun.
Regardless of the graphical value the game was still fun, He has no reflections on anything, the little girl looked like a childs doll, and dead people looked like piles of nothing, and even the hammer wasn't impressive, when it comes to low graphics i say FEAR pays the bills, as for high it owns the bank =).
The game is fun no matter the graphics, my comp is currently in the shop so i have to make due till i get it back, but just to be clear it will run on a pc this bad, so don't say it won't =D.