Extra hard difficulty: Hold Left for three seconds, then press Right
at the main menu. Next, press Circle, Triangle.
The "Option" selection will turn red to confirm correct
code entry. Enter the option menu to change the difficulty setting
to extra hard.
Information in this section was contributed by Thomas.
Play as the enemy: Press Right, Down, Down/Right,
Down, Down/Left, Left, Triangle at
the main menu. The "Game Start" option will turn red
to confirm correct code entry. Select "Game Start" to
access a menu that will allow all bosses and some enemies to be
selected for game play.
Information in this section was contributed by Thomas.
Versus mode: Press Down, Circle, Right, Square,
Up, X, Left, Triangle at the main
menu. A sound will confirm correct code entry. A versus mode option
will be now be available.
Information in this section was contributed by Thomas.
