Witchaven

For the demo:

RSVP (Max out health, ammo, and magic and gives you 9 of each potion)

For the full game:

Hit BACKSPACE to activate the cheats

SCOOTER (Get all weapons and spells)

MOMMY (Get 9 of each potion)

WANGO (Max out health and armor, gives you all the keys, and makes you level 7)

IDKFA, RSVP, or, RAMBO (Instant Death)