Unlock Johanna:
Successfully complete the game under the easy difficulty setting to unlock Johanna, the sniper character.

Unlock New scopes:
As you progress through the game, you will unlock better scopes.

Unlock X-ray vision:
When you complete the game the first time, you will unlock x-ray vision. Press A after you zoom in with the scope.

Unlock .44 mag revolver:
To unlock the .44 mag, start a career and complete any level's two seasons.

Sneaking up on deer:
Use the scent cover when sneaking up on any deer.

Exiting tree stand safely:
When in a tree stand and you want to get out, look down at the ground first. After that, get out.