Auto Camera:
During gameplay, hold Control and Alt and then tap C for auto camera.
Auto Camera takes the veiw to the location of any location of any animal in the area.

Healing:
During gameplay, hold Control and Alt and then tap H to give yourself
full health

Targeting Aid:
During gameplay, hold Control and Alt and then tap B for boxes. The boxes
outline everything, and highlight the correct places to shoot and animal while aiming. Red boxes means kill zone, green for probable kill, yellow for possible kill.

Toggle Wind:
During gameplay, hold Control and Alt and then tap W

Toggle Snow:
During gameplay, hold Control and Alt and then tap S

Toggle Rain:
During gameplay, hold Control and Alt and then tap R

Extra Cash
While buying inventory type in Alt + Ctrl + m to earn money. You can only go up to $20,000, and when you spend the money simply type that over and over.

Extra Hunting Hours
Go back to your hunting camp at about 7:55 PM. Then go to the lodge, and then go back to camp. Keep doing this until the time reads any time past 12:00 AM. Then you can start hunting! This can be useful if you don't have a lot of time left to fill your tags.