In order to unlock more difficulty options, do the following
Unlockable How to Unlock Admiral difficulty Finish the game (any difficulty)
Contributed By: JPTorres26.
Know Something We Don't?
You can submit new cheat codes for this game using our Cheat Submission Form.
Have We Been Fooled?
If you see a non-working or fake code in the list above, let us know by using our Problem Submission Form.