God mode:
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Quickly press Up, Down, Left, Right, Up, Down, Left, Right during game play.
All weapons:
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Quickly press Up, Down, Left, Right, A, B during game play.
Level select:
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Quickly press X, Up, Right, Up, Right during game play.
Invisibility:
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Quickly press X, B, A, B during game play.
Kill all spawned enemies:
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Quickly press A, B, Y, X, A, B, Y, X during game play.
Kung Fu fists:
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Quickly press Right, Down, Left, A during game play.
Minigun:
——–
Quickly press Up, Up, Down, Down, A, B, A, B during game play.
No knock downs:
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Quickly press Up, A, Up, B, Y, Up, X during game play.