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