Blood n' Guts Mod is a gore mod for AvP2. It increases the size of all the blood splats, blood droplets, gibs/guts/chunks of meat and bone. Essentially all the gore is ramped up. However, the gore level isn't too unrealistic and it's not not too tame either. The gore level is at a nice sweet spot where you will feel like there is more carnage and mayhem, without completely obstructing your screen with blood.
Download link: http://kingskins.avpunknown.com