Batman: Vengeance Cheats

Infinite batarangs and electric batarangs
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At the main menu, press L1, R1, L2, R2. If you entered the code correctly, you will hear a sound.
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"All Weapons" and "Unlimited Ammo" cheat
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Go to the Plant Electrocution 2 level. You will start the Plant Electrocution 2 level by sliding down towards some holes in the ground. The second hole is not fatal. Fall into it and glide (to avoid minor damage). You will see a lit area. Glide down there and pick up the item you find inside. Use the grapnel to exit, jump out of the hole, and finish the slide. The item you picked up should be the key do the door right beside the vines behind the glass. Go inside and fight one of the "Plant Men". You will find an envelope that has a "C" on it in the room. When you finish the game, you can activate this cheat for all weapons and infinite ammunition.

Some cheats

Enter the following cheats at the main menu.
All cheats-Press L2, R2, L2, R2, SQUARE, SQUARE, CIRCLE, CIRCLE.
Unlimited batcuffs-Press SQUARE, CIRCLE, SQUARE, CIRCLE, L2, R2, R2, L2.
Unlimited bat launcher-Press CIRCLE, SQUARE, CIRCLE, SQUARE, L1, R1, L2, R2.
Unlimited electric batarangs-Press L1, R1, L2, R2.

Happy gaming =p

Master Code

At the main menu, press L2, R2, L2, R2, square, square, circle, circle.

Chtz

Tap in l2 r2 l2 r2 Sq sq o o
Go 2 power moves (x on pause menu)
Then press -) 2 reach cheat menu
Now tap followin
All power moves & 120 Achievement pts l1 l1 r2 r2 l2 r2 l1 r2
Infinite handcuffs sq o sq o l2 r2 r2 l2
Infinite batlauncher o sq o sq l1 r1 l2 r2
Infinite batarangs l1 l2 r2

Hope this helps,

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Cheatzforcheez

Enter the following cheats at the main menu.

ALL CHEATS
Press L2, R2, L2, R2, Square, Square, O, O.

UNLIMITED BATCUFFS
Press Square, O, Square, O, L2, R2, R2, L2.

UNLIMITED BAT LAUNCHER
Press O, Square, O, Square, L1, R1, L2, R2.

UNLIMITED ELECTRIC BATARANGS
Press L1, R1, L2, R2.

When You are at the rooftop battle when you are at the part after you beat up the thug after the cut scene of Mary's apartment grappel up then follow the guy who has Mary.
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When you open up the door.The thug will go thru another door.The door that he came out fo his locked.Keep following the thig out the door.
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Then grapple up to follow him.Then cuff the other thug.Then jump(don't gilde)to where the thug with Mary went.Don't worry you die.
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Then do a little jump and you will land on a legde go slowly to the corner and turn left and you'll be able to grapple.
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Grapple and after you grapple open the door and pick up the item.And you are in the room where it was locked when the thug came out!
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This cheat works I tried it.