Master code:
Go to the options screen and select "Cheats". Press Y to enter a cheat code. 
Enter CHEATINGMUTHATRUCKER or ATJCEHJMJ to unlock all available cheats. 
If you choose to have the automatic Sat Nav, it will always take you to where you 
will get the best price, but you will not be able to race against the other truckers. 

Evil truck:
Enter VARLEY as a code in the options screen. 

Alternately, play Trial By Trukin' 60 day mode, then win the race back to Big 
Mutha Trucking HQ. 

Fast truck:
Go to the options screen and select "Cheats". Press Y to enter a cheat code and 
enter GINGERBEER. 

$10 million:
Go to the options screen and select "Cheats". Press Y to enter a cheat code and 
enter LOTSAMONEY. 

Level select:
Go to the options screen and select "Cheats". Press Y to enter a cheat code and 
enter LAZYPLAYER. 

Unlimited time:
Go to the options screen and select "Cheats". Press Y to enter a cheat code and 
enter PUBLICTRANSPORT. 

Disable damage:
Go to the options screen and select "Cheats". Press Y to enter a cheat code and 
enter 6WL. 

Automatic Sat Nav:
Go to the options screen and select "Cheats". Press Y to enter a cheat code and 
enter USETHEFORCE. 

Diplomatic immunity:
Go to the options screen and select "Cheats". Press Y to enter a cheat code and 
enter VICTORS. 

Small pedestrians:
Go to the options screen and select "Cheats". Press Y to enter a cheat code and 
enter DAISHI.
 
Bonus levels:
Go to the options screen and select "Cheats". Press Y to enter a cheat code and 
enter JINGLEBELLS.

Max Fruit:
Go to the options screen and select "Cheats". Press Y to enter a cheat code and 
enter CHEATINGMUTHATRUCKER.