To enter a code, press the key on your keyboard while at the hunt screen. A command console will drop down from the top of the screen. Type in the code, and then presses to activate it. To return to the hunt screen, press again.

Effect - Code

Add more animals to the hunting location -rmnoah
Approach nearest animal -rmshot
Attract animals -rmgoodstuff
Attract animals to your position -rmurine
Cycles through the weather -rmblizzard
Faster hunter -rmlight
Gun is sighted in -rmsharpshot
Make animals ignore you -rminvisible
Rainy weather -rmrain
Snowy weather -rmsnow
View all animals on map and GPS -rmshow