Refill ammunition and health
Pause game play, then press L1(2), L2(2), L1, R1, L1, R1, R2, R1. Note your level will be penalized each time this code is activated. Note: This does not make the Jehuty invincible.

Versus mode
Press Circle, X, Right, Left, Right, Left, Down(2), Up(2) at the "Press Start" screen. A sound will confirm correct code entry. Alternately, successfully complete single player mode under any difficulty setting. Complete the game a second time under any difficulty setting to unlock two more stages.