Full health gauge:
Pause game play, then hold L1 + R1 (in order) and quickly press Right, Down, Left, Up. A sound will confirm correct code entry.

Full Master Mode gauge:
Pause game play, then hold L1 + R1 (in order) and quickly press Left, Down, Right, Up. A sound will confirm correct code entry.

OUR RATING FOR THIS GAME: 

(5 is best)