A to Z Cheats

Batman Vengeance

Master code
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Press L, R, L, R, X(2), Y(2) at the main menu. A sound will confirm 
correct code entry. 

Unlimited electric Batarangs
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Press L, R, B, White, L at the main menu. A sound will confirm 
correct code entry. 

Hint: Bridge: Envelope B
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Knock out the thug at the start of the level. You should see the 
glowing item on the left when you start. Climb the ladder and jump/
glide around the crate onto the other crate. Then, glide onto the 
platform with the letter. 

Hint: Gasworks: Envelope E
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You will reach a room with two levels, each floor with two goons on 
them. First, take out the goons. Then, look around on the lower floor 
until you see a sewer pipe with boxes in the sewage. Carefully glide 
down and land on the first box. Jump over the next few boxes and pick 
up the envelope with an "E" on it. Finish the game and the "Infinite 
Health" cheat will be unlocked. 

Hint: Plant Electrocution 2: Envelope C
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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 unlimited ammunition. 

Hint: Rooftop Battle: Envelope A
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When the clowns chase Mary, you will go up to the rooftops. Grapple hook up 
to her roof and beat up the white clown. Go up to the next roof, where you
 are on a little balcony. Jump across, then go in to see a thug run across 
a hall with the girl. Follow and he will jump off the roof. Follow, look 
down, and drop to lowest edge. Walk along to left until at the corner the 
grapple icon appears Grapple over, go in the door and pick up Envelope A.