All Weapons:
During game press SELECT and when map of the level
displays press L1 to turn off "real time". Then enter: Square, Triangle,
Square, Square, Circle, Square, Circle, Triangle.
Full Ammunition:
During game press SELECT and when map of the level
displays press L1 to turn off "real time". Then enter: X, Square, Triangle,
Triangle, X, O, Triangle, X.
Full Energy:
During game press SELECT and when map of the level
displays press L1 to turn off "real time". Then enter: Triangle, X, X, O, X,
Triangle, Square, Square.
Invincibility:
During game press SELECT and when map of the level
displays press L1 to turn off "real time". Then enter: Circle, Circle,
Square, Circle, Triangle, X, X, Circle.
Thanks to Revolution readers Ben Folks and Vjeran!