Painkiller

Cheatmode:
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Submitted by: HanVirsum
 
Start game as usual, in game - bring up the console with ~ and 
input the following codes (NOT CaSe SeNsItIvE): 

Code                 Result
---------------------------
PKGOD              - toggle 'godmode' on/off 
PKDEMON            - toggle 'demon morph' on/off 
PKWEAKENEMIES      - toggle 'enemies get 1 hp' on/off 
PKALWAYSGIB        - toggle 'excessive gibbage' on/off 
WEAPONSPECULAR 1/0 - toggles 'weapon specular' on/off 
PKWEAPONS          - gives all weapons 
PKAMMO             - full ammo 
PKHEALTH           - full health 
PKPOWER            - full ammo/health 
PKGOLD             - lots of gold 
PKHASTE            - toggle haste on/off 
PKWEAPONMODIFIER   - toggle 'weapon modifier mode' on/off 
PKKEEPDECALS       - toggle 'decals will never disappear' on/off 
PKKEEPBODIES       - toggle 'bodies will never disappear' on/off 
 


Cheats[demo]:
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Submitted by: conner54

Here is a list of console commands compiled from the results. 
Some of these commands are flags, as in they must be followed with a 0 or 1.

NAME:
----
GOD
GIVEALL
EXIT
SHOWWEAPON
SERVER
FOV
MSENSITIVITY
MAP
JOIN
MSMOOTH
TPP
PLAYERPREDICTION
CAMERAINTERPOLATION
HUDSIZE
QUIT
FRAGLIMIT
CROSSHAIR
TIMELIMIT
SPEEDMETER
BULLETTIME
POS
ROT
DIDELTASCALE
WEAPONSPECULAR
USEDINPUT

I found a couple "if debug then" statements so I'm guessing most of them 
will not work unless you start the game in a "debug" mode. At least this 
is the case with "GOD" and "GIVEALL".

Entering debug mode is most likely accomplished by passing a command-line 
parameter to the game or adding/editing values in a configuration file.