There are 3 main bosses. The first is an easy T-rex just blast hell out of it and the special weapon and tek arrows and when it falls get your knife out then run up to it and stab. Then after a while you fall into a cave and you baattle big ass bugs. They loook similar to scorpions well after that theres this big eel thing. one word for this.....ANNOYING. ok just right when it about to bite you shoot it with flameys special weapon when you run out just flame it it eventually but slowly dies. Then the last mission where you kill Kane is a walk in the park just act like a dino mauls you. Thea trex realtively harder cause ther is no cover. But first get the sticky bomb gun shoot with the special when it gets close but normally just shoot it then detoinate. around some of the crates theres a shoty Use the it for the flare only. Then around another crate is an rpg just blast it from there.