Huge apes encountered in the Tomb Raider Series. They are massive in Anniversary, towering over Lara, however in the original they were about the same height as Lara. They have dark brown fur and like most enemies in Anniversary, lack pupils.
Gorillas tend to come in packs. They can climb so you can't get a height advantage over them. A Shotgun Shell can quickly rid you of them but if you want to use your shotgun and you want to use your Dual Pistols then keep moving around and try to keep off the floor. In Anniversary, doing a headshot move will result in instant death for the Gorilla.