1. Unlock all levels:
Go to the main screen an d go to continiue and go to password. Now put in triangle, circle, X, right, right, circle, square, down, and start. From there go to coopertive or single player and choose your level. By pressing left and right.
2. All helicopters in 2 player mode:
Password is: Down,Down,Down,Down,X,X,Cicle,Circle.
Different ending sequence:
Password Square,Down,X,Down,Right,Up,Up
then play through the last mission.
3. Unlock all co-pilots:
At the password screen, enter Up, Down, Up, Down, Up, Down, Up, Down.
4. All items:
At the password screen, enter X, Square, Circle, Circle, Square, Circle, Circle, R1, R2.
5. Level Passwords (in single player):
2 X, Down, Left, Left, Square, Circle, Circle, Right
3 Triangle, Up, Left, Right, Down, Triangle, Square, Up
4 Down, Down, Square, Square, Left, Right, Circle, X
5 Right, Right, X, Circle, Down, Up, Down, Up
6 Up, Up, Left, Right, Down, Down, X, X
7 Square, Circle, X, Square, Triangle, 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, Right, Square, X, Up, Down, Circle, Triangle
14 Left, Left, Up, Right, Right, Up, Down, X
15 Square, Right, Left, Circle, Circle, Up, Down, Square
16 Down, Up, Down, Up, Triangle, Circle, Triangle, Circle