Type codes in during gameplay, press T and type in the cheat.

Code	Effect
AlaMode	God mode.
BlockMyAss	Maxed out armor.
BlowMe	Gives balloon gun.
CarryMore	Gives backpack.
Groovy	Slow motion.
Healthful	Maxes out health.
MagicMags	Infinite ammo for current weapons.
NoPlaceLikeOz	Opens exit.
TheQuick	Fast firing weapons.
YourHeadASplode	Enemy heads explode on death.