In the game just press [T] and then enter the following codes:

 mpimyourfather                 God mode on/off
 mpwegotdeathstar               Infinite ammo
 mpkingoftehmonstars            All weapons and full ammo
 mpmimimi                       All weapons and full ammo
 mpmaphole                      Complete mission
 mpdrdentz                      Fill health
 mpwonderbra                    Fill armour
 mpyoulooklikeyouneedamonkey    Add all armour options
 mpgoattech                     Add all weapons upgrades
 mpmiked                        Exit game
 mpbuild                        Show game build
 mpasscam                       3rd person view on your character
 mppos                          Show position on/off
 mprosebud                      Spawn snowtruck
 mpracerboy                     Motor bike
 mpflowerpower    Paintball mode
 mpexorbitantamounts            Gore mode
 mpsanta                        All weapons, ammo and items
 mduro                          Jeep
 mtrabant                       Trabant
 mdead                          Suicide


 - Unknown effect codes:

 mpexorbitantamounts
 mphookmeup
 mpcampos
 mpwhoami
 mpbeenthere
 mpcam
 mpbreach
 mptriggers
 mpboyisuck
 mppoly
 mpfov
 mplightadd
 mplightscale
 mpcamera
 mpwmpos
 mpwpos
 mpteleport
 mpclip

 By -= CyberMan =-, cyberman@ag.ru