Z Full Metal Jacket mode: Enter Square, Circle, X, Triangle, Triangle, X, Circle, Square as a password. Invincibility: Enter Square, Triangle, Circle, X, X, Circle, Triangle, Square as a password. Enable controller two: Enter X, Triangle, Square, Circle, Triangle, Circle, X, Square as a password. Destroy enemy base: Press Triangle on controller two during game play to destroy the enemy base. Suicide: Press Square on controller two during game play to destroy your base. Hint: Level 5 door: There is a locked door in the third hallway in level 5. To open it, go to the very beginning and find the key by searching. Note: You can not find the key until you reach the door before heading back. Level Password 2 Square, Triangle, X, Circle, Triangle, Square, Circle, X 3 Square, X, Circle, Triangle, Triangle, Square, X, Circle 4 Square, Triangle, X, Circle, Circle, Triangle, X, Circle 5 X, Circle, Square, X, Triangle, Square, X, Circle 6 Square, Circle, Triangle, X, Circle, X, Square, Circle 7 X, Circle, Square, X, Triangle, Triangle, X, Circle 8 X, X, Circle, Triangle, X, Circle, Square, X 9 Circle, X, Circle, Square, X, Circle, Square, Circle 10 Circle, Triangle, Circle, Circle, Square, Triangle, X, Circle 11 X, Square, Circle, X, X, Square, Square, Circle 12 X, X, Circle, X, Circle, X, Square, Circle 13 Circle, Triangle, X, Circle, Triangle, Square, X, Circle 14 Square, Triangle, X, Circle, Triangle, X, Circle, Square 15 Square, Triangle, X, Circle, Square, Triangle, X, Circle 16 Circle, X, Circle, Square, Square, X, Square, X 17 Circle, Square, Triangle, X, Triangle, X, Circle, Square 18 Square, Circle, Square, X, X, Circle, Circle, Triangle 19 X, Circle, X, Circle, Triangle, Triangle, X, Circle 20 Triangle, Triangle, X, Circle, Triangle, Triangle, X, Circle