All weapons:
Pause game play and press Start, A, B, Select(5), Start.
Double points:
Pause game play press Start, A, B(2), A, Right, Down, Up, Left(2), Start.
Instant stopping:
Pause game play and press Up, Down, Left, Right, Select.
Level skip, extra lives:
Pause game play and press Start, A, B, Select, Right, Left(2), Right, Select, B, A, B(2), A, Start. Note: Enable this code when no submarines are remaining to gain additional lives. This code may only be enabled once per game.
Slow automatic scrolling:
Pause game play and press Up, Down, Left, Right, Up, Down, Left, Right, Up, Down, Left, Right, A, B(2), A.
Disable automatic scrolling:
Pause game play and press Up(2), Down(2), Left(2), Right(2).
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