Invincibility:
Press Right, X, R1, Triangle, Up, L2, X, Left, L1, Circle, X, R2 at the "Press Start" screen. "Press Start" will flash to confirm correct code entry. Note: The game cannot be saved when codes are enabled.
All weapons:
Press Up, Down, X, Square, R1, Triangle(2), Left, Circle, L1(2), Right at the "Press Start" screen. "Press Start" will flash to confirm correct code entry. Note: The game cannot be saved when codes are enabled.
Level select:
Press R2, Triangle, Left, Circle, Square, L2, Left, Up, X, Down, L2, Square at the "Press Start" screen. "Press Start" will flash to confirm correct code entry. Note: The game cannot be saved when codes are enabled.
Full bolt:
Press Left, Right, Up, Down, L1, Circle, Triangle, R2, Left, Down, Square(2) at the "Press Start" screen. "Press Start" will flash to confirm correct code entry. Note: The game cannot be saved when codes are enabled.
Full spread:
Press L2, R1, Circle, L2, Down, Up, L1, Right, Left, X at the "Press Start" screen. "Press Start" will flash to confirm correct code entry. Note: The game cannot be saved when codes are enabled.
Full homing:
Press Right, Up, Square, L1, Left(2), L1, Left, Circle, Left at the "Press Start" screen. "Press Start" will flash to confirm correct code entry. Note: The game cannot be saved when codes are enabled.
Full beam:
Press Left, Circle, Triangle, Right, L1, Square, Left, R1(2), Triangle at the "Press Start" screen. "Press Start" will flash to confirm correct code entry. Note: The game cannot be saved when codes are enabled.
Full area effect:
Press Left, X, Triangle, Up, X, Down, Square, L2, Left, R2 at the "Press Start" screen. "Press Start" will flash to confirm correct code entry. Note: The game cannot be saved when codes are enabled.
No power-up drops:
Press Down, Up, X, Square, Down, Up, X, Square, L1, L2, Square, Circle at the "Press Start" screen. "Press Start" will flash to confirm correct code entry. Note: The game cannot be saved when codes are enabled.
Boss mode:
Press R1, Triangle, Down(2), X, L2, Left, Square, Right, Triangle, R2, L1 at the "Press Start" screen. "Press Start" will flash to confirm correct code entry. Note: The game cannot be saved when codes are enabled.
Training missions:
Press Square, Up, L2, Left, Triangle, X, R2, Circle, Right, R1, Square, Circle at the "Press Start" screen. "Press Start" will flash to confirm correct code entry. Note: The game cannot be saved when codes are enabled.
Boss mode:
Press R1, Triangle, Down(2), X, L2, Left, Square, Right, Triangle, R2, L1 at the "Press Start" screen. "Press Start" will flash to confirm correct code entry. Note: The game cannot be saved when codes are enabled.
Agent data:
Press Up, Down, Circle, R2, Left, L2, Right, X, R2, Square, Up, R1 at the "Press Start" screen. "Press Start" will flash to confirm correct code entry. Note: The game cannot be saved when codes are enabled.
Alien data:
Press Square, L1, Circle, L2, Down, Triangle, R1, Right, X, Left, R2, Triangle at the "Press Start" screen. "Press Start" will flash to confirm correct code entry. Note: The game cannot be saved when codes are enabled.
"Making Of" feature:
Press Circle, R2, L2, Circle, Triangle, Down, Square, X, Right, L1, X, Up at the "Press Start" screen. "Press Start" will flash to confirm correct code entry. Note: The game cannot be saved when codes are enabled.
Versus mode:
Hold L1 + R1 and press Square + Circle at the title screen.
Hint: Backflip:
Press Square + Down.
Hint: Somersault:
Press Forward + Square.
Press R1 + Square to somersault to the right or L1 + Square to somersault to the left.
Hint: Better guns:
Get better guns by using Agent K.
Hint: Faster speed:
If you want to be faster, use Agent J.
Hint: Defeating Bosses:
When fighting the Bosses, it is just as easy to use your pistols than any other gun.
