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Unlimited Health

You must be in the PRESS START menu. HOLD - L1, L2, R1, R2 (simultaneously)
Then in the proper sequence (digital pad): UP, RIGHT, DOWN, LEFT, UP, LEFT, DOWN, RIGHT.

Unlimited Combo Meter

You must be in the PRESS START menu. HOLD - L1, L2, R1, R2 (simultaneously)
Then in the proper sequence (digital pad): LEFT, RIGHT, UP, DOWN, RIGHT, LEFT, DOWN, UP.

Unlock All Upgrades

You must be in the PRESS START menu. HOLD - L1, L2, R1, R2 (simultaneously)
Then in the proper sequence (digital pad): UP, UP, LEFT, LEFT, RIGHT, RIGHT, DOWN, DOWN.

Unlock End-Game Rewards (Mega Cheat)

You must be in the PRESS START menu. HOLD - L1, L2, R1, R2 (simultaneously)
Then in the proper sequence (digital pad): DOWN, UP, DOWN, UP, LEFT, RIGHT, LEFT, RIGHT.

Unlock Dark Knight Difficulty Level

You must be in the PRESS START menu. HOLD - L1, L2, R1, R2 (simultaneously)
Then in the proper sequence (digital pad): DOWN, LEFT, RIGHT, UP, UP, RIGHT, LEFT, DOWN.

Defeating Clayface

When battling Clayface do not attack him. Attack the electric fuses at the sides of the roof top attack them with your batarang and it will shock him. While the electricity has him in place, attack him.

Defeating Bane

When you are fighting Bane you can easily defeat him, but then he will charge himself again. Now he is not easy to defeat anymore. Stand at a wall, and press R1 and left or right when he charges at you. Then he will become dizzy. Go and beat him up till he comes back to his senses.

Defeating Scarecrow

When your're fighting Scarecrow he won't appear anywhere. He will send his ghosts to attack you. There are 4 round tiles on the floor. Go to each tile and press the punch or kick button. The inScarecrow will be standing on one of the tiles. When he get's hit by your punch or kick he will appear there. Keep attacking him till he disappears, and repeat this step until his life is all gone. Do not go after the ghosts.

Deflecting Grab Attacks

While fighting, some enemies might grab you. Press punch or kick and you will break free + hit them back.

Extra Points

While fighting, use this move: X,X,Square. Each you time use it, your points will get higher and go up from GREAT to AWESOME to EXCELLENT. You can use this move 3 times on a person, whether it's a boss or a simple warrior.