Amped 3 Cheat Codes

All sleds
Enter RT, X, LT, Down, Right, LB, LT, RT, Y, X as a code at the "Cheat Codes" screen under the options menu to unlock 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!: Complete Act 3
King Of The Mountain Lab: Impress a number of bystanders in DC
Snowbird Bound!: 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: 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