5 upgrade points:
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At the Crew Screen enter Up, Down, Left, Right, Select, Start, Select.
All ships available in all missions:
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At the main menu, press Up, Down, Left, Right, Select, Start, X to unlock all
ships available in all missions.
All ships for Skirmish and Multiplayer modes:
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At the skirmish screen enter Up, Down, Left, Right, Select, Start, Square.
Mission Select:
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At the main menu, enter Up, Down, Left, Right, Select, Start(2).
Unlock Klingon Campaign:
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At the main menu, enter Up, Down, Left, Right, Select, Start, Triangle.