Star Trek: Tactical Assault Cheats

Title Cheats
When at the main menu, enter the given D-pad and button presses and a window should pop up giving some sort of cheat code confirmation. A quick word though: you MUST enter the cheat every time you boot up the game to make them work.

[Up], [Down], [Left], [Right], [Select], [Start], [Select]: Extra Crew Upgrades – Gain 5 promotion points, use at the crew screen
[Up], [Down], [Left], [Right], [Select], [Start], [Y]: Unlock all ships for Skirmish and Multiplayer
[Up], [Down], [Left], [Right], [Select], [Start], [Start]: Unlock any mission – Allows you to switch missions on the briefing screen
[Up], [Down], [Left], [Right], [Select], [Start], [X]: Unlock Klingon Campaign
[Up], [Down], [Left], [Right], [Select], [Start], [B]: Use any ship you like in a mission

Unlock Ships for Skirmish/Multi-player Modes
Ships unlocked following the completion of the following missions in either Federation or Klingon Campaigns, for use in either the Skirmish or Multi-player modes.

Gorn Heavy Cruiser: Mission 15 (Klingon Campaign)
Gorn Light Cruiser: Mission 12 (Klingon Campaign)
Orion Destroyer: Mission 6 (Klingon Campaign)
Orion Heavy Cruiser: Mission 9 (Klingon Campaign)
Romulan Destroyer: Mission 6 (Federation Campaign)
Romulan Dreadnaught: Mission 3 (Klingon Campaign)
Romulan Frigate: Mission 3 (Federation Campaign)
Romulan Heavy Cruiser: Mission 12 (Federation Campaign)
Romulan Light Cruiser: Mission 9 (Federation Campaign)
USS Excelsior: Mission 14 (Federation Campaign)