Master code
While at the main menu press L2, R2, L2, R2, Square(2x's), Circle(2x's). A sound will verify proper entry.

Unlimited Batlauncher
While at the main menu press Circle, Square, Circle, Square, L1, R1, L2, R2. A sound will verify proper entry.

All power moves and 120 achievement points
While at the main menu press L1(2x's), R2(2x's), L2, R2, L1, R2. A sound will verify proper entry.

Unlimited electric Batarangs
While at the main menu press L1, R1, L2, R2. A sound will verify proper entry.

Unlimited Handcuffs
While at the main menu press Square, Circle, Square, Circle, L2, R2(2x's), L2. A sound will verify proper entry.

Hints & Tips

Rooftop Battle: Envelope A
When the clowns pursue 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 tiny 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
You will go into the elevator shaft. Ride the elevator 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 locate the control box. Use a Batarang to disable it and the door behind it will now be open. Stay clear of the elevator and wait for the proper time to get in the open room. Inside the room is "Secret Key 2." Get out of the room and ride the elevator back 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 available.

Bridge: Envelope B
Knock out the thug at the begining 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.

Blimp puzzle
Look in your inventory and examine the disc Batman picked up before combating Mr. Freeze. It will reveal potential 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 attempting the 999 possibilities on the lock, look for figurines like the one in the room near your starting spot. 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).

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

Smoke bombs
When you are in the level after the Batcave training, when you reach the area with a Joker thug, look around the big square. You will find a ladder. Climb up the ladder, then look around for a box. Pick it up to receive smoke bombs.

Envelopes
Batman can find hidden envelopes during 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 you find one, it will have a letter on it. They make infinite weapons, infinite charge bar, infinite health, double damage, and invisibility available. They are awarded by the order they are found, and not the letter. For example, if you collect Envelope E first you will get infinite weapons instead of invisibility.

Hacking into Issac Evers files
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.

Gasworks: Envelope E
You will come to 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 available.

Plant Electrocution 2: Envelope C
You will begin the Plant Electrocution 2 level by sliding down towards some holes in the ground. The second hole is not lethal. Fall into it and glide (to avoid minor damage). You will see a lit area. Glide down there and pick up the item you locate inside. Use the grapnel to leave, 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 battle 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 enable this cheat for every weapon and unlimited ammunition.