Amped 3 - All sleds

Unlock All Build Objects:
Choose "Options" from the main menu, then select "Cheat Codes" and enter the following: LT, RT, UP, UP, RB, LEFT, RIGHT,, X, Y, LB.

Unlock All Challenges:
Choose "Options" from the main menu, then select "Cheat Codes" and enter the following: RIGHT, LB, LT, X, LEFT, ROB, RT, Y, LT, X.

Unlock All Clothing, Gear, Costumes, Awesomeness:
Choose "Options" from the main menu, then select "Cheat Codes" and enter the following: Y, DOWN, UP, LEFT, RIGHT, LB, RIGHT, RT, RT, RB.

Unlock All Mountains:
Choose "Options" from the main menu, then select "Cheat Codes" and enter the following: X, Y, Up, Left, LB, LB, RT, X, Y, LT.

Unlock All Music:
Choose "Options" from the main menu, then select "Cheat Codes" and enter the following: UP, LEFT, RT, RB, RT, UP, DOWN, LEFT, Y, LT.

Unlock All Tricks:
Choose "Options" from the main menu, then select "Cheat Codes" and enter the following: LB, RT, Y, UP, DOWN, X, LT, LEFT, RB, RT.

Unlock All Zones On Available Mountains:
Choose "Options" from the main menu, then select "Cheat Codes" and enter the following: DOWN, X, RIGHT, LB, RIGHT, RB, X, RT, LT, Y.

Gamer Points
Accomplish the indicated task to get Gamer Points:

Laax Stock And Barrel: Impress a number of bystanders in Laax
Northstar Nirvana: Impress a number of bystanders in Northstar
Rescued Weiner Boy: Successfully complete Act 3
King Of The Mountain Lab: Impress a number of bystanders in DC
Snowbird Bound: Successfully complete Act 1
Snowbird Dawg: Impress a number of bystanders in Snowbird
Viva Valle: Impress a number of bystanders in Valle Nevado
Vamonos A South America: Successfully complete Act 2

Hang Glider slide:
Complete Story mode to unlock the Hang Glider slide.

Park Builder items
Get the indicated number of points in a combo to unlock the corresponding item in Park Builder mode:

Lighthouse: 1,000,000 points
Helicopter: 800,000 points