Full concept modification of S.T.A.L.K.E.R. Call of Pripyat that touches every game aspect including textures, sfx, music, weapons, AI, items, weather difficulty and much more.
1) Enemies shooting hundreds of bullets but having just a few in their pockets
2) Stamina decreases too quickly, considering the emission rate that's a frustrating combination
3) vendors not buying unique products if their usage is below 75%. Trust me a vendor would buy a f2000 even if it were below 25%.
4) cave textures are terrible, some terrain/concrete textures too.
With the intention of being realistic, it ends up feeling like its "overly" realistic, while some aspects make sense, others do not. The idea that a trained military sniper gets too tired to even move after WALKING about 100 yards, only carrying 10 pounds of equipment, seems silly to me. A normal person might get tired, but military personnel are trained to run for miles with much heavier equipment.
The ai could still use work, their detection system is most certainly unrealistic and can be very easily abused. Vendors won't buy weapons that have been worn at all, which all of them are since it is "hard to get good weapons into the zone." It doesn't make sense that all vendors would only buy and sell weapons in perfect condition if this were the case. A smuggler can get better weapons in then the military, who controls what goes in an out? Come on now.
A decent mod, the retextures look like silly grimdarkness, the designer is clearly more interested in his own opinion as opposed to the community's though.
You should probably just stick to vanilla on master difficulty.