Easy wins
Since the new, big thing for this game is the ability to leap from car to car, many people think that this is the easiest way to win the game. However, I have found that sometimes the easiest way to win a level (especially the Hard Balls boss battle) is to just blow cars up instead of taking the time to capture them. It gets you back to the boss or goal faster. This is not the only strategy, as you will want to get a new weapon / car, but this will get you through some of the tricky spots easily.
Time Trial Mode Vehicles
Complete one of the following levels with an 'A' rank during the Capelli missions to unlock the corresponding vehicle in Time Trial mode.
Hampton Avenger: Rat Race level
Hampton Monte Cristo: Rat Race level
JME Marlin: Cold Contract level
JME Otter IV: Witness Protection level
KMT Seareaver: Cold Contract level
Zephyr ATS Law Enforcer: Don The Run level
Various Codes
At the Main Menu, select Options. Select the Cheats option.
The following codes are possible and have the corresponding effect:
Code - Effect
Big Wheels - Wheels and Propelers double in sizeReoffender - Double the loss on all negative justice
Double Damage - Does Double the damage
Invincibility - Makes you invincible
Iron Man - Half health
Laser Law - All police weapons shoot blue lasers, others shoot red lasers
Law Lord - Gives full Justice at all times
Open Road - No civilian traffic
Speed - Increases character speed
Sticky Feet - You cant get thrown out of vehicles
Wild Water - Water is always choppy
Deflective Armor...