There are a total of 1317 achievements in this game to be had. More easy guides here to get 100% here

Controls

W = Forward
A = Left
S = Back
D = Right
E = Interact
Mouse wheel = roll to change weapons.
Right mouse button = Zoom with weapon
Left mouse button = Fire weapon / attack bare fists or knife

1) Load game. On the main screen select TUTORIAL. As soon as it opens (image 1 below) the achievement will pop you can now press escape and go back to the main menu.

From the main menu select SINGLE PLAYER (image 1 below). Then select CAMPAIGN (image 2 below).







































Now press play. Pick up weapons from crates shoot dinosaurs watch the achievements pop.

Game Tips -

1) While playing check the settings you can turn snow on etc click them so they're ticked then untick them all.

2) Change weapons regularly each level has different weapons so use them all. To use zoom on guns it's right mouse button left to fire. Use your fists as well as the knife.

3) Enjoy it's a fun game I had all the achievements by playing the first 5 rounds. But I did take the dogs out in the yard to play with them as achievements just pop while while the game is running. Although some are weapons related (Tip 2 above). That's game 100%.