During gameplay type these cheat cheats:

Code         Effect
------------------------------
FLURP      - Unlimited Ammo & auto-matic reload 
SGTROCK    - All weapons - full ammo - infinite health
BADASS     - Gives you weapons and ammo
GTNX       - Skip current level
FUCKIT     - Enable swearing & blood
YOUARE     - Show xplace
HOLLYWOOD  - Your not hurtable to gunshots
ETHER      - Slow-motion mode