Enter [Triangle], [Circle], [X], [Right],
[Right], [Circle], [Square], [Down] as a password.
Select either a single player or cooperative game, then press
[Left] or [Right] at the level selection screen.
Enter [X], [Triangle], [Circle], [Left],
[Down], [X], [Right], [X] as a password. Note:
The code must be re-entered for each level.
Enter [Right], [X], [Triangle], [Triangle],
[Down], [Square], [Square], [Left] as a password.
Enter [Right], [Down], [Circle], [Up],
[Up], [Left], [Circle], [X] as a password.
All choppers including the UFO, Zeppelin, and the Baron will be
unlocked.
| Level | Password |
| 2 | [Up], [X], [Triangle], [Right], [Left], [Square], [Circle], [X] |
| 3 | [Triangle], [Circle], [Down], [Right], [Square], [Square], [Up], [Up] |
| 4 | [X], [Right], [Left], [X], [Circle], [Square], [Square], [Triangle] |
| 5 | [Down], [Down], [Circle], [Square], [Circle], [Square], [Right], [X] |
| 6 | [Triangle], [X], [Up], [Left], [Right], [Left], [Circle], [Triangle] |
| 7 | [Right], [Square], [Right], [Down], [Circle], [X], [X], [Right] |
| 8 | [Triangle], [Right], [Square], [Square], [Circle], [Down], [Down], [X] |
| 9 | [Up], [X], [Square], [Left], [Right], [Circle], [Left], [Left] |
| 10 | [Triangle], [Up], [Circle], [X], [Square], [Down], [Down], [Down] |
| 11 | [Circle], [Circle], [Up], [Left], [Right], [X], [Triangle], [Square] |
| 12 | [Right], [Up], [X], [Right], [Circle], [Square], [Triangle], [Circle] |
| 13 | [Left], [Left], [Triangle], [Circle], [X], [X], [Down], [Right] |
| 14 | [Square], [Right], [Circle], [Up], [Down], [Square], [Down], [X] |
| 15 | [Left], [Right], [Circle], [X], [Square], [Down], [Down], [Circle] |
| 16 | [Triangle], [Circle], [X], [Right], [Right], [Circle], [Square], [Down] |
| 17 | [Square], [Up], [Up], [Right], [Left], [Square], [Down], [X] |
| 18 | [Circle], [X], [Right], [Triangle], [Square], [Up], [X], [X] |
| 19 | [Down], [Right], [X], [Square], [Right], [Up], [Circle], [Circle] |
| 20 | [Up], [X], [Circle], [Up], [Left], [Square], [Circle], [X] |
| 21 | [Left], [Circle], [Triangle], [Down], [X], [X], [X], [Circle] |
| 22 | [Triangle], [X], [Down], [Left], [Right], [X], [Circle], [Square] |