Instant double shot power-up:
Pause the game play after passing the first Boss and
press Up(2), Down(2), Left, Right, Left, Right, Square,
Triangle. 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.
Note: To this power-up for player two, press Up(2),
Down(2), Left, Right, Left, Right, Square, Triangle,
Select, Start.
Instant laser shot power-up:
Pause game play after passing the first Boss and press
Up(2), Down(2), Left, Right, Left, Right, X, Circle.
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. Note: To use this
power-up for player two, press Up(2), Down(2), Left,
Right, Left, Right, X, Circle, Select, Start.
Extra Edit mode:
Successfully complete or accumulate ten hours of game
play in Gradius 3 to unlock an "Extra Edit" option. This
option allows weapon combinations to be edited. More
weapons can be unlocked for editing by completing the game
a second time, or by accumulating another ten hours of game play.
Cube Attack mode:
Reach level 9 in Gradius 3 to unlock Cube Attack.
Original Gradius levels:
Intentionally allow a Boss in level 10 in Gradius 3 to hit
you to unlock levels from the original Gradius. The original
levels will also be unlocked in extra mode.
Boss Rush mode:
Successfully complete Gradius 4 to unlock Boss Rush mode.
Stage select:
Successfully complete Gradius 4 without using any continues
to unlock the Stage Select option for that game.
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