To activate cheats, go to the Options screen and locate the Cheat function. To turn on a specific cheat, combine the columns of words to form a single long word. If you get it right, a message will indicate it's correct. Once you begin the game, pause and turn the cheat on.

Code - Result

TRIASSASSINDONTDIE - God mode
LAMEYANKEEDONTFEED - Restore health
ANGRYXXXINSANEHOOKER - Fill bloodlust
NAKEDNASTYDISHWASHERDANCE - Time factor mode
ONTHELEVEL - Level select
DONTFARTONOSCAR - Enemy freeze
SHOWMEMYWEAPONS - Show weapons
INSANEGIBSMODEGOOD - Gratuitous dismemberment mode
JUGGYDANCESQUAD - Juggy mode