Teenage Mutant Ninja Turtles 3: Mutant Nightmare
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:
|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|
|Collect all gems in Story Mode||ALternate ending Picture|
|Complete mission mode with Donetello||Donetello picture|
|Complete mission mode with Leonardo||Leonardo Picture|
|Complete mission mode with Michaelangelo||Michaelangelo Picture|
|Complete mission mode with Rapheal||Rapheal Picture|
Contributed By: Nickf42.