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All Weapons and Infinite Ammo:
While playing, pause the game and press Square, Cicle, R1, L1.
All Levels:
At the main menu, press and hold Square + L1 + R1 then press Up, Down, Left,
Right.
Infinite Heath:
At the main menu, press and hold R1 and L1 then press Square, Triangle, Right,
Left, Cirlce, Square, Square, Right.
While playing, pause the game and press Square, Cicle, R1, L1.
All Levels:
At the main menu, press and hold Square + L1 + R1 then press Up, Down, Left,
Right.
Infinite Heath:
At the main menu, press and hold R1 and L1 then press Square, Triangle, Right,
Left, Cirlce, Square, Square, Right.