Full health:
Pause, hold all four triggers and press Triangle, Down, X, Up.
Full ammo:
Pause, hold all four triggers and press X, Down, Triangle, Up.
Get extra 1000 XP:
Pause, hold all four triggers and press X, Down, Down, Down.
Level 2 skills:
Pause, hold all four triggers and press Circle, Right, Circle, Right.
Level 3 skills:
Pause, hold all four triggers and press Triangle, Up, Triangle, Up.
Level 4 skills:
Pause, hold all four triggers and press Square, Left, Square, Left.
Level 5 Skills:
Pause, hold all four triggers and press X, X, Down, Down.
Invincibility:
Pause, hold all four triggers and press Triangle, Square, X, Circle.
Note: Will only work once the game has been completed.
Infinite missile weapons:
Pause, hold all four triggers and press Square, Circle, X, Triangle.
Note: Will only work once the game has been completed.
Devastating attacks:
Pause, hold all four triggers and press Square, Square, Circle, Circle.
Note: Will only work once the game has been completed.
One hit kills:
Pause, hold all four triggers and press Circle, Circle, Triangle, Triangle.
Note: Will only work once the game has been completed.
All combo upgrades:
Pause, hold all four triggers and press Triangle, Circle, Triangle, Circle.
Note: Will only work once the game has been completed.
Small enemies:
Pause, hold all four triggers and press Triangle, Triangle, X, X.
Note: Will only work once the game has been completed.
Slow-motion:
Pause, hold all four triggers and press Triangle, Circle, X, Square.
Note: Will only work once the game has been completed.