At the Main menu enter the following codes to unlock the corresponding effect, if they have been entered correctly a window will pop to confirm. These codes must be re-entered everytime you start the game.

Unlock ALL Missions:
At the Briefing screen enter Up, Down, Left, Right, Select, Start, Start.

Unlock Extra Crew Upgrades (5 Promotion Points):
At the Crew screen enter Up, Down, Left, Right, Select, Start, Select.

Unlock ALL Ships for Skirmish and Multiplayer:
Up, Down, Left, Right, Select, Start, Y.

In a Mission select any Ship:
Up, Down, Left, Right, Select, Start, B.

Unlock Klingon Campaign:
Up, Down, Left, Right, Select, Start, X.