Only if you want to finish the game fast:
During game play, press start. You should see the
inventory list. Go to a blank square and hold down
select and R2. Press R2 again to edit the amount of
ammo you want for that weapon. During game play, press
Start & Select button at the same time; you’ll probably
see the inventory list. Just go back to the main game
screen and press Select again to activate the DEBUG
screen which you can change from one level or scene to
another.
