All Co-Pilots
In the passwords screen enter Up, Down, Up, Down, Up, Down, Up, Down.

All helicopters in two player mode:
Enter Down, Down, Down, Down, X, X, Circle, Circle as a password.

Bonus mission:
Enter Up, Down, Circle, Up, Down, Square, Triangle, Right as a password.

Invincibility:
Complete the game three times with the girl as your co-pilot.

Single player mission passwords

Mission	Password
2	X, Down, Left, Left, Square, Circle, Circle, Right
3	Triangle, Up, Left, Right, Down, Triangle, Circle, Up
4	Down, Down, Square, Square, Left, Right, Circle, X
5	Right, Right, X, Circle, Down, Up, Down, Up
6	Square, Circle, X, Square, Triangle, Left, Up, Right
7	Square, Circle, X, Square, Left, Up, Right
8	Right, Down, Left, Up, Triangle, Down, Up, Down
9	Circle, Circle, Right, Up, Right, Up, X, X
10	X, Down, Down, Down, Down, X, Left, Right
11	Triangle, Up, Circle, Down, Square, Left, X, Right
12	Up, Up, Triangle, Triangle, Left, Left, Circle, Circle
13	Left, Down, Left, Down, Square, Circle, Square, Circle
14	Down, Down, Down, Down, X, X, Circle, Circle
15	Square, Right, Left, Circle, Circle, Up, Down, Square
16	Down, Up, Down, Up, Triangle, Circle, Triangle, Circle

Multi-player mission passwords

Mission	Password
2	Right, Up, Square, X, Up, O, Up, Right
3	Left, Down, Left, Down, Up, Up, Up, Up
4	Square, X, X, Square, O, Triangle, Triangle, Square
5	O, O, Square, Down, Down, Square, X, X
6	X, Up, O, Down, Triangle, Left, Square, Right
7	Up, Down, Down, Down, Right, Left, Left, Left
8	Left, Left, Triangle, Right, Right, Triangle, Up, Up
9	Square, Square, Square, O, Down, Down, Down, Left
10	O, Up, Left, Square, Up, Left, Down, Down
11	Triangle, O, Triangle, O, Up, Up, Down, Down
12	Up, Down, Left, Right, O, O, Up, Square
13	X, Left, Left, Left, Square, Triangle, O, X
14	Left, Down, Left, Down, Square, O, Square, O
15	Down, Down, Down, Down, X, X, O, O
16	Triangle, Down, Triangle, Down, Square, Up, Square, Up

Cheats