Have Extra Chemical X Bottle:
To get an extra Chemical X Bottle, press X(2), Circle, X, Circle, L1, L1, X, X, CIRCLE, X, CIRCLE, L1, L1 during gameplay.

Refill Health:
To refill your health by 1/3, press L1, L2, L1, SQUARE, R2, R1, R2. To fill it all the way, press L2, R1, R2, L1, X, TRIANGLE, CIRCLE, SQUARE, R2, L1, L2, R1.