Your current task: Get on the other side o the valley
There is not much left from the bridge so prepare yourself to travel trough the valley. Try not to fight and just run - follow the way indicator.
Don't try to fight the T-Rex when he arrives - try to avoid him and run.
Your current task: Find a way out of the caves
It is going to be a dark and claustrophobic part of the game. As usual - follow Slade through the caves. Now it's safe.
There is going to be lots of walking through narrow passages and listening to Slade's complaints.
Soon you will hear the scream. You won't be able to help this poor buddy, but at least Slade will get the shotgun.
Slade will fire the flare, which attracts the raptors. Now remember - you cannot kill all the raptor, they will spawn endlessly. So just follow Slade, fight off incoming beasts and try to move.
Soon you will fall down. Fortunately, you can catch your breath. Pick suitable weapons and move along.
It's time for enemy soldiers to show up. Just do your job.
Find a ladder made from roots and head towards the daylight.
Your current task: Find Slade
Much better, right? Turok will contact Slade. He is alive. Move along.
Your current task: Kill the dinos
Meet dilofosaurus. You cannot kill him by knife, so prepare yourself to stuff him with bullets. The game will remind you about dodging - indeed it's very useful.
Cross the water and use the "ladder" - you don't have to kill all the dinos.
Your current task: Head towards a smoke on the horizon
Cutscene time - some beast will attack you atop of it, but Reese will come with relief. The more the better - and it is the end of the chapter.