Turok

Spoiler, so the longhunter is the level 3 boss. You will know you are getting close when there is a save point right before a bunch of big long pillars you have to jump across without falling. After a short path of them you will see quite a few and some have the purple health triangles. The middle is your goal to get t0 the boss arena but go left and down the pillar path on left to get the chronoscepterpiece if you need it. Look on left for very tall wall to climb up once you go down the left pillar path. Once you get to the arena at the end of the level and touch the water in the very middle the boss battle starts. On medium I had to kill a Humvee looking vehicle then another comes out to kill. They drive in circles quite fast and try to run you over. Once you kill them both then you have to kill the guy longhunter. He is standing there when the first Humvee comes out but you cant kill him until you have dealt with the 2 vehicles. Check the water on the outer rim of the arena before you start for armor and a few other goodies.