Unlockable: Difficulty Settings
Unlock the following difficulties by performing the actions listed below:

•Easy difficulty - Pass three beginner tracks
•Hard difficulty - Pass three medium tracks
•Medium difficulty - Pass three easy tracks
•Extreme difficulty - Pass three hard tracks

Unlockable: Various
Unlock the following bikes and more by performing the actions listed below:

•Reptile bike - Pass three beginner tracks
•Phoenix EVO bike - Pass three medium tracks
•Scorpion bike - Pass three easy tracks
•Micro Donkey bike - Pass National Bike Cup tournament with a gold medal result
•Platinum Club - Pass one extreme track (this unlocks the hidden platinum medal track time/fault limits)
•Tournaments - Pass all tracks in any of the eight tournaments to unlock that tournament

Unlockable: Skill Games
Unlock the following skill games by performing the actions listed below:

•Delivery - Pass one beginner track with a gold medal result
•Down the Stairs - Pass two beginner tracks with gold medal results
•Flip Hunter - Pass two easy medium with gold medal results
•Giant Ball Outside - Pass three easy tracks with gold medal results
•Hill Climb - Pass two easy tracks with gold medal results
•In Flames - Pass three beginner tracks with gold medal results
•Infernal Pinball - Pass one medium track with a gold medal result
•Loose Screw - Pass three medium tracks with gold medal results
•Target Hunt - Pass one easy track with a gold medal result

Unlockable: Xbox Live Gamer Pictures
•Complete Container Rush without releasing the throttle even for an instant to unlock a gamer pic (and the "Full Throttle" Achievement).