Destruction Derby Arenas cheats and cheat codes for Playstation 2

Super Grip:
The spinning tire and wheel icon is a Super Grip. This allows you to climb hills at 
full speed and have overall great handling for 20 seconds. There are 2 extra things 
that I have found to do with Super Grip so far and they are: 

1 - If you lose a wheel, get a Super Grip Icon and your car will level out and 
behave as though the wheel is still there. 

2 - In the Titan arena, get a Super Grip Icon and climb the outer slope at an angle. 
Then, as you are on the vertical slope, hit the Rocket Icon to be propelled. After 
the second Rocket Icon, get your car to the top of the turn and you should get the 
Bonus 3000 Points Icon.
Submitted by ElTorro

Unlock Rough Justice and Bonus Cars 1, 2, and 3:
Win 1st place in all arenas in Destruction Derby mode.

The Dam and Bonus Cars 4 and 5:
Win 1st place  on all tracks in Wrecking Race mode.

Unlock Brennan as playable character:
Beat Brennan on the Refinery stage

Bonus Bowl and Track:
Win 1st place in all Races and Destruction Bowls in Single Races.