Select the "Trial By Trucking" option at the main menu. Then, enter one of the following codes at the cheat menu to activate the corresponding cheat function.

Effect - Code

Additional bikers - BIKERS
Additional police - COPS
$115,000 - CASH
Invincibility - NODAMAGE
Open all bridges - BRIDGE
No police - NOCOPS
All missions unlocked - MISSIONS
All gallery images unlocked - GALLERY