RB (X2), DOWN, LEFT, UP, RT, X, RB, X (X2) ALL AWESOMENESS
LEFT, RT, LB, RT, X (X2), Y, DOWN, UP, X ALL BUILD LICENSES
LT, RT, UP (X2), RB, LEFT, RIGHT, X, Y, LB ALL BUILD OBJECTS
RIGHT, LB, LT, X, LEFT, RB, RT, Y, LT, X ALL CHALLENGES
DOWN, X, RIGHT, LB, RIGHT, RB, X, RT, LT, Y ALL CONFIGS
Y, DOWN, UP, LEFT, RIGHT, LB, RIGHT, RT, RT, RB ALL GEAR
X, Y, UP, LEFT, LB (X2), RT, X, Y, LT ALL LEVELS
UP, LEFT, RT, RB, RT, UP, DOWN, LEFT, Y, LT ALL MUSIC
RT, X, LT, DOWN, RIGHT, LB, LT, RT, Y, X ALL SLEDS
LB, RT, Y, UP, DOWN, X, LT, LEFT, RB, RT ALL TRICKS
UP, RT, X, Y, LB, X, DOWN, LB, RT, RB AWESOMENESS ALWAYS ON
Y, RT (X2), LB, DOWN (X2), LEFT (X2), RIGHT, LB LOUD SPEAKERS
RT, DOWN (X2), UP, X, LB, Y, RT, Y, DOWN LOW GRAVITY BOARDERS
X (X2), LB, DOWN, RIGHT (X2), UP, Y (X2), LT NO AI
X (X4), Y (X3), X SUPER SPINS

Password Effect  -  RT, X, LT, Down, Right, LB, LT, RT, Y, X Unlock All Sleds

Achievements  -  Here are the various achievements that can be unlocked in Amped 3 and added to your gamerscore.

Greater Snow God Get a gold medal on ever challenge
King of the Mountain Lab Impress the required amount of bystanders in DC
Laax Stock & Barrel Impress the required amount of bystanders in Laax
Lesser Snow God Get a medal on every challenge
Northstar Nirvana Impress the required amount of bystanders in Northstar
Rescued Weiner Boy! Finish Act 3 of the story
Snowbird Bound! Finish Act 1 of the story
Snowbird Dawg Impress the required amount of bystanders in Snowbird
Vamonos a South America Finish Act 2 of the story
VIVA VALLE! Impress the required amount of bystanders in Valle Nevado

Get a helicopter  -  Get a 1,000,000 point combo to get the helicopter.

Hang Glider Slide  -  Hang Glider slide complete the story mode

Unlock 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.

Unknown Result  - Enter Up(2), Down(2), Left, Right, Left, Right, X, Y as a code at the "Cheat Codes" screen under the options menu.