Instant laser shot power-up: Pause game play after defeating the first
Boss and press Up(2), Down(2), Left, Right, Left, Right, L1, R1. A sound
will confirm correct code entry. Note: This may only be done up to 25
times, equal to the number of levels that have been successfully
completed.
Instant double shot power-up: Pause the game play after defeating the
first Boss and press Up(2), Down(2), Left, Right, Left, Right, L2, R2. A
sound will confirm correct code entry. Note: This may only be up to 25
times, equal to the number of levels that have been successfully
completed.
Bonus credit: Every hour of accumulated game play will add one bonus
credit to your total.
Free play: Accumulate 18 hours of game play to unlock free play mode
(unlimited credits).
Weapon edit mode: Successfully complete the game. Press R1 in the weapon
selection screen to turn on weapon edit mode. Press L1 to return to the
normal weapon selection.
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