Various Cheats - All Modes

Pause gameplay and enter any of the following "Codes":

Code                    Effect 
painless                God Mode 
fogging                 Fogging On/Off 
followme                Move Camera 

Various Cheats - Sharp Shooting Mode

Pause gameplay and enter any of the following "Codes":

Code                    Effect 
weapons                 All Weapons 
ammo                    Unlimited Ammo 
autoreload              Auto Reload On/Off 
autofire                Auto Fire On/Off 
slowmo                  Enemies are Slower 
slowrocket              Rockets are Slower 

Various Cheats - Driving Mode

Pause gameplay and enter any of the following "Codes":

Code                    Effect 
ghost                   Drive Through Walls 
nitro                   Unlimited Nitro 
freeze                  Toggle Time Limit 
chantastic              Drive Faster 
snow                    Snow 
susonly                 Drive Only with Tires 

Various Cheats - Action/Adventure Mode

Pause gameplay and enter any of the following "Codes":

Code                    Effect 
weapons                 All Weapons 
ammo                    Unlimited Ammo 
freeze                  Freeze Enemies 
targeting               Toggle Auto Targeting 
laser                   Toggle Laser Targeting 
ghost                   Walk Through Walls 
followterrain           Jump as High as You Want 
mrbones                 Become a Skeleton 
shocked                 Become Electric 
fps                     First Person Perspective 
fragyuck                More Blood 
pillowmode              Small Heads 
bighead                 Big Heads