Here is the full list of all 13 Oakwood achievements.
Complete the game
Get devoured by a t-rex
Discover a strange creature's remains
Access the secret area
Collect all totems
Complete 'There's Something in the Sewers'
Picked up the night vision goggles
Complete 'Into the Woods'
Complete 'Oakwood Lodge'
Trap a dinosaur
Discover the abandoned lodge
Complete 'Welcome to Camp'
Find the campsite