Go to the main menu, and select "options".

After, select the "Cheats" and type one
of the next codes bellow:

Effect - Code
All police weapons shoot blue lasers, others

shoot red lasers - Laser Law
Double the loss on all negative justice -

Reoffender
Gives full Justice at all times - Law Lord
Half health - Iron Man
Increases character speed - Speed
Makes you Invincible - Invincibility
No civilian traffic - Open Road
Water is always choppy - Wild Water
Wheels and Propelers double in size - Big

Wheels
You cant get thrown out of cars - Sticky Feet\