Enter codes during gameplay:
Extra Chemical X Bottle:
X, X, Circle, X, Circle, L1, L1, X, X, Circle, X, Circle, L1, L1.
100% Health Boost:
L2, R1, R2, L1, X, Triangle, Circle, Square, R2, L1, L2, R1.
30% Health Boost:
L1, L2, L1, Square, R2, R1, R2.