Level select:
Enter the options screen. Set "Vibration"
to "1" and "Sound effects" and "Music"
to "0". Then, hold L1 + L2 + R1
+ R2 + Circle + Square. The message "Spooky
Cat" will appear in the middle of the screen to confirm correct
code entry.


Ending bonuses:
Successfully complete the game under the hard difficulty
setting. The maniac difficulty setting and a bonus helicopter
and will now be unlocked. The bonus helicopter flies, turns, climbs,
descends, and shoots faster.
Successfully complete the game under the maniac difficulty setting
to unlock a third bonus helicopter, which you can use on any difficulty
setting. It has the same top speed and fire rate as the second
bonus helicopter, but more armor.


AWACS view:
Press Triangle + Up.


Target view:
Press Triangle + Down.



Weapon view:
Hold Triangle while firing wing mounted weapons.