Amped: Freestyle Snowboarding (Xbox)

Secret Characters
At main menu go to "Options" and then "Cheats"

Play as Raven : RidinwRaven
Play as Steezy : ChillinwSteezy
Level Select : GimmeGimme
Perfect Jumps : StickiT
Low Gravity : MegaLeg
Disable Tree Collisions : buzzsaW
Free Movement : ZiPster
Super Spins: WhirlyGig

Programmer Replays
Enter replay theater, highlight hard disk, press right until game disc appears. To play one of the levels, select a replay and highlight watch replay. Press right until you see challenge and simply select it.