3 Extra Continues
Press Triangle, Square, Circle, X, Triangle, Circle, Square, X, Triangle, Square, Triangle.
Secret Level
At the Code screen, enter commando.
99 Chips
At the Code screen, enter activate.
Restore Health
Press X, Triangle, Triangle, Circle, X, Triangle, Triangle, Circle, Square, Square.
Weaken Virus
Press Triangle, Triangle, Square, Circle, X, Triangle, Circle, Square, Square, Square, X.