Amped 3 Cheats
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.
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