Thunderstrike:Operation Phoenix
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.