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• Alternate costumes

The following characters can be unlocked by spending the indicated amount of Justice League of America shields that can be collected during game play.

Code - Effect

Batman (Batman Beyond infiltration suit) - 74 shields
Batman (classic blue) - 59 shields
Flash (Jay Garrick) - 21 shields
Flash (Walter West) - 48 shields
Green Lantern (bold) - 30 shields
Green Lantern (retro) - 23 shields
Martian Manhunter (modern) - 29 shields
Martian Manhunter (true) - 15 shields
Superman (black recovery suit) - 32 shields
Superman (Earth 2) - 65 shields
Superman (Kandor) - 91 shields
Wonder Woman (biker) - 61 shields
Wonder Woman (toga) - 44 shields
Zatanna (classic blue) - 25 shields
Zatanna (Identity Crisis) - 38 shields
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• Bonus heroes

The following characters can be unlocked by spending the indicated amount of Justice League of America shields that can be collected during game play.

Code - Effect

Aquaman - 27 shields
Green Arrow - 76 shields
Green Lantern (Hal Jordan) - 84 shields
Green Lantern (Kyle Rayner) - 55 shields
Hawkgirl - 70 shields
Huntress - 53 shields
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• Challenge Missions

Just finish the game on Medium difficulty to unlock some bonus missions. This time you can select any character.
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• Cheat mode

Press Start to pause game play. Then, hold L + R and use one of the following cheat codes:

Code - Effect

Up(2), Down(2) - 20 shields
Left, Right, Left, Right - 35 random boosts
Left, Down, Right, Up, Left, Down, Right, Up - Invincibility
Right, Down, Right, Down - Maximum abilities
Right Down Left Up - Purchase all Heroes
Left Up Right Down - Take less damage than usual
Down, Down, Right, Right, Up, Up, Left, Left - Unlimited Energy
Down(2), Right(2), Up(2), Left(2) - Unlimited Superpower
Down, Left, Up, Right - Unlock all costumes
Down Right Down Left - Unlocks all cinematic scenes
Down, Left, Up, Right - Unlocks Everything
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• Completion bonuses

Successfully complete the game to unlock the "Continued Play" option (to allow a new game to be started with all previous stats and items unlocked" and an alternate main menu background (with characters from the game).
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• Fast health recovery

Upgrade your health recover and the strongest weapon for the character you are currently using. For example, upgrade the Flash's Whirlwind ability or Wonder Woman's Tiara throwing ability with Damage and Duration boosts. All the characters lose health quickly to most any kind of attacks. It is wise to have a fast recovery of health. Use the Speed Boosts in all the recovery slots.
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• Helpful cheats

During the gameplay, press Start. Then at the pause screen, hold L and press the following for the cheat:

All Heroes: right down left up
Invinciabilty: left down right up left down right up
Infinite power: down x2 right x2 up x2 left x2
All Alt. Costume: down left up right
All Cinematic: down right down left
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