Light Flyer Jet:
Successfully complete the game with the normal ending. Note: Use Limit 500 or Unlimited modes.

Leo Copter Jet:
Successfully complete the game with the good ending. Note: Use Unlimited, Mirror or Reverse modes.

Foo Fighter Jet:
Successfully complete the game with the Light Flyer and Leo Copter bonus jets. Note: Use Unlimited,
Mirror or Reverse modes.

The Fly Jet:
Successfully complete the game with the Foo Fighter bonus jet. Note: Use Unlimited, Mirror or
Reverse modes and destroy all the balloons in the bonus level.