Goodies option:
Press Triangle, Square, Circle, Left, Square,
Triangle, Square, Circle, Left, Square within
three seconds at the "Press Start" screen. An additional selection
will appear at the end of the options menu that allows level selection, all
weapons, unlimited ammunition, and the ability to view the FMV sequences.
Stage select:
Enable the "Goodies option" code. Then, press Left, Right,
X, Triangle, Left, Up within three seconds at the
"Press Start" screen. A white screen flash, sound effect, and display
of the cheat name will confirm correct code entry. An option that will allow
selection of an individual stage within a level will become available. Note:
Enabling this code may cause music and graphic problems.
Nakomi mode:
Press Up(2), Down(2), Left, Right, Left, Right,
X, Circle within three seconds at the "Press Start"
screen. A white screen flash, sound effect, and display of the cheat name will
confirm correct code entry. All 3D characters except the Boss will be flattened.
Big head player:
Press Square, Circle(2), Square, Up, Square,
Circle(2), Square, Triangle within three seconds at the
"Press Start" screen. A white screen flash, sound effect, and display
of the cheat name will confirm correct code entry.
Big head aliens:
Press Square, Circle(2), Square, Up, Square,
Circle(2), Square, X within three seconds at the
"Press Start" screen. A white screen flash, sound effect, and display
of the cheat name will confirm correct code entry. Note: This code does not
affect the Boss.
Turbo mode:
Press X, Square, Triangle, Circle, X, Square,
Triangle, Circle, L2, R2 within three seconds at the
"Press Start" screen. A white screen flash, sound effect, and display
of the cheat name will confirm correct code entry. Press Circle during
game play to run faster. Note: This will also use any item currently being held
by your character.
Grayscale graphics:
Press X(2), Triangle(2), Square(2), Circle(2), Up,
Down within three seconds at the "Press Start" screen. A white
screen flash, sound effect, and display of the cheat name will confirm correct
code entry.
Sepia graphics:
Press Left(10) within three seconds at the "Press Start"
screen. A white screen flash, sound effect, and display of the cheat name will
confirm correct code entry.