Press "~" to access the console and enter the following cheats:
PKAMMO: Gives full ammo
PKPOWER: Gives full ammo and health
PKWEAPONS: Gives all weapons
PKGOLD: Gives a lot of gold
PKKEEPBODIES: Toggles 'bodies will never disappear' on/off
PKKEEPDECALS: Toggles 'decals will never disappear' on/off
PKDEMON: Toggles 'demon morph' on/off
PKWEAKENEMIES: Toggles 'enemies get 1 health point' on/off
PKALWAYSGIB: Toggles 'excessive gibbage' on/off
PKGOD: Toggles 'god mode' on/off
PKHASTE: Toggles 'haste' on/off
PKWEAPONMODIFIER: Toggles 'weapon modifier mode' on/off
WEAPONSPECULAR: Toggles 'weapon specular' on/off. Press 1 and 0 to toggle.
Tip:
To make enemies drop a gold piece (bigger than those found by destroying things) you'll need to use the secondary fire (throwing out the spinning claw) of the painkiller.
Keep using it on a dead enemys body, throwing them up in the air usually about 5 times, and the body will drop a gold piece! Submit Cheat Codes for PainKiller Print/Copy Cheat Codes for PainKiller | 
