Invincibility:
Enable the "Cheat mode" code. Press R(7), Left at the main
menu in the NTSC version of the game. A sound will confirm correct code entry. The
invincibility option may now be enabled on the cheat menu. For the PAL version of
the game, press R, C-Right, R, L, R(3), Left.
All Items:
Press R, right C, right. L, left C, Left, right C, and right to get the
all items and weapons code.
When you run out of ammo you have to access the code again.
No monsters:
This code will "turn off" all of the monsters in the game:
Press L, left c, left, R, right c, right, left, and left.
To access the cheats menu press:
Left, Left, L, L, Right, Right, Left, Left.
Now to turn on Invincibility press the R button 7 times and then press
left on the control pad.
To change levels enter L, L, L, Right C, Right, Left, Left, Left C.