G.I. Joe: The Rise of Cobra (Sony PSP)
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Cheat mode
Enter one of the following codes at the main menu or title screen to activate the corresponding cheat function. A sound effect or the phrase "Yo Joe!" will be heard to confirm correct code entry.
Function
How to unlock
Duke classic costume
Press Left, Up, Square, Up, Right, Triangle.
Scarlett classic costume
Press Right, Up, Down(2), Triangle.