Press F2 to bring up the console at the Hunt screen. Type in the following codes and
press Enter to activate: 

rmblizzard    Cycle through weather  
rmgoodstuff   Attract animals
rminvisible   Animals ignore you
rmlight       Move faster
rmnoah        Increase number of animals in area
rmrain        Rain
rmsharpshot   Sights in your gun
rmshot        Brings you up close to the nearest animal
rmshow        See all animals on the map and GPS
rmsnow        Snow