Resident Evil 2: Dual Shock Edition Cheats

Unlimited Ammo
During a game, push Select to open the options menu. Choose Key Configuration and hold R1 while pressing the SQUARE button [ten times]. When activated, the Auto or Manual setting should turn red.

Extreme Battle Mini Game
To get Extreme Battle, you must complete the game in all four scenarios. When the game is completed, a screen will appear saying a mini game is unlocked. Save your data. There will be a save called “Ex. Battle 1.” Load it. You will come to a screen which says Extreme Battle, and you can play this mini game, starting with Claire and Leon. When you beat it with them other characters will become avalible.

Get secret photo
When in the stars office go to the desk that says someone was here the desk is trashed.Press it 50 times and you will get an secret photo of Rebecca Chambers from RE1.

Hint: Extreme Battle Mode (Bomb Locations)
Anti-virus bomb positions: I know that the positions of 4 anti-virus bombs are random but in my experience, they could be in four of these positionss:
Ben Bertoluccis cell
Watchmans room
TV Room
3rd floor – Clock Tower
Meeting Room
Guard Room
S.T.A.R.S. office
Sherrys first place of meeting her