Bonus trucks:
To unlock the eight monster trucks you need to do the Champ Tour. The eight
monster trucks you can unlock are Grave Digger, Maximum Destruction, Avenger,
Redtoid, El Toro Loco, Inferno, Predator, and Eradicator.
Moon track:
Race in every offroad and collect all 50 stars to unlock the Moon track. Go to
the training mode and race on the Moon. On this track you can collect 27 stars.
Each one represents a man or woman that worked on the game.
Sites: