Enter these codes at the cheat function in the options menu. A message will indicate correct code entry. 

Dismemberment: INSANEGIBSMODEGOOD
Fill Bloodlust: ANGRYXXXINSANEHOOKER
Enemies Freeze: DONTFARTONOSCAR
Invincibility: TRIASSASSINDONTDIE
Juggy Mode: JUGGYDANCESQUAD
Top Off Health: LAMEYANKEEDONTFEED
Show Weapons: SHOWMEMYWEAPONS
Time Factor: NAKEDNASTYDISHWASHERDANCE
Level Select: Enter ONTHELEVEL for a code and go back to the main menu. Highlight the "New" option and while holding Select press Start.