A single magazine can easily kill two Gorefasts and do quite a bit of damage to the enemies behind them before the gun needs to be reloaded. Decapitating them will prevent them from charging and make each bullet from the Bullpup do as much damage as a headshot would. Bullpup headshots as a Commando also work well on a group of Gorefasts because of how easy it is for the Bullpup to decapitate them.
A few pellets hitting the Gorefast's head will kill him. If someone is killed by or near a Gorefast, they will start eating the body of the deceased (or the initial location where someone died if their ragdoll goes flying). If a Gorefast is beheaded, they will no longer be able to charge. When they get close enough, they'll start trying to impale the target with their spear. When they get close, they will charge towards someone. His right hand has been mutated into a giant spear, which he uses as a weapon.
There are several black spots on his body, most near his chest and his mouth.
There is a strange red spot that appears on his forehead and on his crotch. The Gorefast is a pale, nude human male with a giant, red vein or pipe that stretches from the back of his head to a hook that is his right arm.