Codes note:
Some codes destroy or modify the game data, so it may not be possible to win the game. Some codes store their status in nvRAM.

Speed mode:
Press C to display the game menu, then press P, Up, LS(2), C, RS, Up, Down. A voice will say "no problem" to confirm correct code entry. Rachel and Gideon will move quicker during the interactive portion of the game.

Night vision:
Press C to display the game menu, then press P, Up, B, C, Up, B. A voice will say "night vision" to confirm correct code entry. The game's graphics will be shaded in red and green. Enter the code again to return to normal mode.

Silly mode:
Start a new game and press Down(3), Up(2), LS(2), RS(2) at the character selection screen. Then, press A over the character to be played. Gideon will appear as a clown, Rachel will grow a beard, and both characters will make a silly comment before the game starts. The characters will then appear normal after the game begins.