Batman - Vengeance

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.

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.

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.

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.

SWAT Chase: Envelope D:
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You will enter the elevator shaft. Ride the elevator all the way down until it
stops. Get off the elevator and wait for it to rise again. After it rises, jump
down to the bottom and use first person mode to find the control box. Use a
Batarang to disable it and the door behind it will open. Stay clear of the
elevator and wait for the correct time to get in the open room. Inside the
room is "Secret Key 2." Get out of the room and ride the elevator up to the
top. At the top there is a door that is supposed to be locked. The key opens
the door, and inside is an envelope with the letter "D" on it. Finish the game
and the "Infinite Special Move Bar" cheat will be unlocked.

Blimp puzzle:
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Look in your inventory and examine the disc Batman picked up before fighting
Mr. Freeze. It will reveal possible colors that work with the Blimp puzzle.
The combination is Purple and Green. Make the color purple, "mix tubes", then
make the color green.

FunnyBones Warehouse lock:
--------------------------
Instead of trying the 999 possibilities on the lock, look for figurines like
the one in the room near your starting location. There is another one behind
trucks and one outside the fence when you get on the roof of the building with
the first figurine. The combination is 619 (from left to right).

Defeating Mr. Freeze:
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Do not charge at him or you will be thrown and probably get frozen. Enter first-
person mode and equip your demolition charges. Make sure Mr. Freeze is following
you. Look up to find glass tanks moving on a hook. When he is under one, fire
at it with your charges then detonate it so that it lands on him. Repeat this
until you get a move where Batman grabs Mr. Freeze's gun and freezes him to
stop him from burning.

Flash bombs:
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Press [Action] + [Guard] to use flash bombs. They cannot be selected in the
gadget/first person view.

Flying:
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To make Batman fly, press [Jump] then press B twice.

Smoke bombs:
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In the level after the Batcave training, when you get to the area with a Joker
thug, look around the big square. You will eventually find a ladder. Climb up
the ladder, then look around for a box. Pick it up to get smoke bombs.

Hacking into Issac Evers files:
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Find the second wire of the color you need (that is not powered). You need to
make the powered wire reach the non-powered one. For example, if you work on
blue, you need to connect the live blue wire to the dead one.

Envelopes:
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Batman can find hidden envelopes throughout the game. The first one is on the
Rooftop Battle level, the second is on the Bridge level, the third is on the Plant
Electrocution 2 level, the fourth is on the Gasworks Level, and the fifth is on
the SWAT Chase level. If find one, it will have a letter on it. They unlock
infinite weapons, infinite charge bar, infinite health, double damage, and
invisibility. They are awarded by the order found, and not the letter. For
example, if you collect Envelope E furstm you will get infinite weapons instead
of invisibility.