All extras except Fury bike:  Enter !SLACKER! as a code.

All ATVs in training:  Enter NOSKILLS as a code.

All music videos:  Enter ROCKNROLL as a code.

Ground stunts:  Wheelie: Press Analog-stick Down while holding Gas.

Endo: While driving, hold Analog-stick Up and press Brake.

Bicycle: While driving, press Analog-stick Left or Analog-stick Right and R2.

Backflip:  Preload suspension at a ramp and pull back.

Preload the suspension at a ramp and hold Down.

Frontflip:  Preload suspension, press Square and press Forward.

Knock off riders:  If another rider comes up beside you, you can easily knock him off his ATV by performing a Bicycle (R2 + Left or Right) to raise your tires into his or her face.

Quick return to track:  When driving around in freestyle mode, hold L1 then press R1. You will automatically return to the spot you were at before you fell.

Glacier Resort: Easy backflip:  Go to the Glacier Resort level after it has been unlocked, but do not go there in amateur short track. Ride around and you should find two colossal ramps that resemble ski ramps. Go up the side of the ramp (up the mountain). You should see an opening when you turn. This is how you go down the ramp. With good speed, you should fall, rather than going down the ramp. Do not worry. Keep your balance, and when you land, do so much preload off the ramp and pull back immediately when you launch off the ramp. If done correctly with enough speed, you should see "Backflip 2500", indicating 2500 points. You can continue the combo. There should be a hill that you wheelie over to and preload off and do a trick. Then, just keep doing wheelies and endos until you get somewhere between 10,000 to 20,000 points.