Enter LOTSAMONEY as a code in the options screen to get $10 million.
Auto Sat Nav
Go to the options screen then put in the code USETHEFORCE.
Evil Truck
Play Trial By Trukin' 60 day mode, then win the race back to Big Mutha Trucking HQ.
Fast truck
Enter GINGERBEER as a code in the options screen.
Get Evil Truck
Go to the options screen then put in the code VARLEY.
Get Small Pedestrians
Enter DAISHI as a code in the options screen, to get small pedestrians.
Get the competer truck
Enter "competer" in the cheats menu to get the competer truck.
Get Tiny Bystanders
Go to the options screen then put in the code DAISHI.
Master Cheat
Go to the options screen then put in the code CHEATINGMUTHATRUCKER OR alternately use the code ATJCEHJMJ. All cheats and the Evil Truck will be unlocked. 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.
New Rig
Win the Race to Big Mutha Truckin in the 60 day version of Trial by Truckin to unlock the new rig.
No Damage
Go to the options screen then put in the code 6WL.
Pick Level
Go to the options screen then put in the code LAZYPLAYER.
Unknown Effect
Go to the options screen then put in the code JINGLEBELLS.
Unlimited money
Press Circle(2) Square, Circle(2), Select at the main menu. A sound will confirm correct code entry. Start a new game, then press Select when it starts.