Various cheats
     Go  to  Options  ->  Player  Profile -> Enter Cheat and enter the
following case-sensitive codes:

Cheat code:        Effect:
All Access         Unlock everything but the Fury bike
$moneybags$        Get 1500 Credits
Billboards         Unlocks all Music Videos
Duds               Unlocks all Rider Gear
Dubs               Unlocks Rims