During gameplay press Triangle, Triangle, X, Square, Triangle, Circle, Triangle, X, Square, X, Triangle, X
Full Shields
During gameplay perss Square, Triangle, Circle, Square, Circle, X, Square, Triangle, Circle, Triangle, Triangle, X
Gain a Life
During gameplay press Square, Triangle, Circle, Square, Square, Triangle, Circle, Circle, Square, Triangle, Square, X
Invincibility
During gameplay press Triangle, X, Square, Square, Triangle, Circle, Circle, Square, Triangle, Square, Circle, X
Maximum Code
During gameplay press Triangle, Square, Square, Triangle, Circle, Circle, Square, Square, Triangle, Circle, Square, Square. Then quit and start a new game to get the new difficulty settings and levels.
New Difficulty Levels and Level Select
During gameplay press Square, Circle, X, Triangle, Square, X, Triangle, Square, X, Circle, Left
Stronger Weapons
During gameplay press Square, Triangle, Circle, Square, Circle, X, Square, X, Circle, Triangle, Square, X
Descent CODES
234
