Press F2 and enter the following codes, then press F2:
Animals are not afraid of hunter: dh4nofear
Bullet view: dh4leadeye
Clear all weather: dh4dry
Display debug information: dh4breakdown
Enable all codes: dh4super
Flight mode: dh4skyhook
Gun sighted in: dh4sightin
Hunter never tired: dh4homegym
Irresistible to animals: dh4beacon
Large deer: dh4monster
Lightning: dh4zeus
More gore: dh4f13
No animals: dh4plague
No clipping mode: dh4truck
No noise: dh4damper
Rainy weather: dh4water
Set time to noon: dh4noon
Snowy weather: dh4ice
Stop slope effect: dh4climber
Thunder: dh4thor
Travel to nearest animal: dh4find