Use the following key when entering the passwords:

L: Leonardo
M: Michaelangelo
D: Donatello
R: Raphael
S: Shredder

Enter "MDLDSSLR" as a password.

Enter "LMDRRMSR" as a password.

Enter "RRDMLSDL" as a password.

Enter "LLMSRDMS" as a password. Shuriken will no longer be available.

Enter "DMLDMRLD" as a password. Healing items will no longer be available.

Enter "SLLMRSLD" as a password. All healing items will turn into Temaki Sushi.

Enter "LDMSLRDD" as a password. One enemy hit will kill the turtles.

Enter "MSRLSMML" as a password.

Enter "SLRMLSSM" as a password.

Successfully complete all sixteen missions in Episode 1 to unlock the Teenage Mutant Ninja Turtles 2: Turtles In Time arcade game.

Successfully complete Mission 6: Episode 1 to unlock Score Attack mode.

Successfully complete Score Attack mode to unlock Time Attack mode.

Successfully complete Episodes 1, 2, and 3 to unlock the Nightmare episodes.

Successfully complete all Nightmare episodes to unlock the Final Nightmare episode.

Successfully complete Mission 1: Episode 1 to unlock Free Battle Arena 1.

Successfully complete Mission 5: Episode 1 to unlock Free Battle Arena 2.

Successfully complete Mission 10: Episode 1 to unlock Free Battle Arena 3.

Successfully complete the Final Nightmare episode to unlock Free mode Area 12 and 13.

Successfully complete Free mode Area 12 and 13 to unlock the Ultimate Turtle Scroll.

Collect any DVD to unlock the "Movie Viewer" option.

Collect the DVD in Free Battle Mission 1 to unlock the April O'Neil movie.

Collect the DVD in Free Battle Mission 3 to unlock the Fugitoid movie.

Collect the DVD in Mission 5 Episode 1 to unlock the Hover Board movie.

Find the DVD in Mission 8 Episode 1 to unlock the Traximus movie.