While playing a game, press [Enter] to display the console window, type one of the following codes, then press [Enter] again to activate the corresponding cheat function. If you entered the code correctly, the message "Cheat Enabled" will appear.
Result
Cheat Code
God mode SheepInTheTrees or FreeWestMemphis3
Invincibility SelfDefenceAgainstFreshFruit
1000 experience points SpotTheBraincell
1000 prestige-points MoneySong
100 more outside support MrHilter
Instant kill TheSpanishInquisition or Inferno
Infinite cargo for repair trucks BicycleRepairMan
Successfully complete current level DirtyHungarianPhrasebook
Unknown TheFunniestJokeInTheWorld