If you use the Konami code (U,U,D,D,L,R,L,R,B,A) at the title screen. You will hear the turtles yell cowabunga, and it will show cowabunga as well.
Contributed By: logannagol.
In the "Options" menu select "Input Password" and enter any of the following:
Password Effect SRDSLLMS Crystals become Easter Eggs DRSSMRLD Crystals become Jack-O-Lanterns LLDMSRMD Crystals become Santa DDRMLRDS Life Icons become Pizza
Contributed By: Cloud20390.
Completing various areas of the game
Unlockable How to Unlock ALternate ending Picture Collect all gems in Story Mode Donetello picture Complete mission mode with Donetello Leonardo Picture Complete mission mode with Leonardo Michaelangelo Picture Complete mission mode with Michaelangelo Rapheal Picture Complete mission mode with Rapheal
Contributed By: Nickf42.
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