Type in these codes at the main menu:

BGNOAH - Increase the number of animals
BGSTEROIDS - Trophy sized game
BGHORNS - Sheep only
BGELABONG - Elk only
BGBULLWINKLE - Moose only
BGYOGI - Bear only

Type in these codes at the Map Screen:

BGURINE - Attract game
BGSHOW - Show game on screen
BGTRACK - Move fast on screen
BGVAMPIRE - Show blood trails

Type these codes during gameplay:

BGBARBECUE - Rocket launcher
BGWEATHER - Weather effects toggle
BGPREDATOR - Infared vision
BGSNIPER - Stop gun from moving