Unlock .44 mag revolver
To unlock the 44 mag start a career and beat any level`s two seasons.
Do this in all the levels to unlock all the guns

Unlock sniper character
Beat the game on easy to unlock the character Johanna.

How to sneak up on Deer
Scent cover is a must to sneak up on all the deer I have done tests with it on and off it makes a big difference!

Tree stands
When you're in a tree stand and want to get out, look down at the ground first then get out. If you don't look down you will be killed from the fall.

Drawing them in
Get a deer feeder and a treestand and get to a thick area with lots of trees and get a call doesn't matter and start calling this may take a good bit of time but it is well worth it. it is way better then chasing a deer around. oh and doesn't matter you can use a bow or a gun

X-Ray Vision & All Weapons
Beat the game one time to unlock X-Ray vision