Painkiller

Display Frames per Second
Press ~ to access the console, then enter: SHOWFPS 1
(Thanks to alynni@hotmail.com)

Full Ammo
Press ~ to access the console, then enter: PKAMMO
(Thanks to alynni@hotmail.com)

Full Ammo/Health
Press ~ to access the console, then enter: PKPOWER
(Thanks to alynni@hotmail.com)

Gives All Weapons
Press ~ to access the console, then enter: PKWEAPONS
(Thanks to alynni@hotmail.com)

Lots of Gold
Press ~ to access the console, then enter: PKGOLD
(Thanks to alynni@hotmail.com)

Toggle 'Bodies will Never Disappear' On/Off
Press ~ to access the console, then enter: PKKEEPBODIES
(Thanks to alynni@hotmail.com)

Toggle 'Decals will Never disappear' On/Off
Press ~ to access the console, then enter: PKKEEPDECALS
(Thanks to alynni@hotmail.com)

Toggle 'Demon Morph' On/Off
Press ~ to access the console, then enter: PKDEMON
(Thanks to alynni@hotmail.com)

Toggle 'Enemies get 1 HP' On/Off
Press ~ to access the console, then enter: PKWEAKENEMIES
(Thanks to alynni@hotmail.com)

Toggle 'Excessive Gibbage' On/Off
Press ~ to access the console, then enter: PKALWAYSGIB
(Thanks to alynni@hotmail.com)

Toggle 'God Mode' On/Off
Press ~ to access the console, then enter: PKGOD
(Thanks to alynni@hotmail.com)

Toggle 'Haste' On/Off
Press ~ to access the console, then enter: PKHASTE
(Thanks to alynni@hotmail.com)

Toggle 'Weapon Modifier Mode' On/Off
Press ~ to access the console, then enter: PKWEAPONMODIFIER
(Thanks to alynni@hotmail.com)

Toggles 'Weapon Specular' On/Off
Press ~ to access the console, then enter: WEAPONSPECULAR 1/0
(Thanks to alynni@hotmail.com)