Spikeout Battle Street - Platform: XBox

Unlock Tenshin:
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Beat stage two in story mode.

Unlock Linda:
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Beat stage one in story mode.

Unlock Spiker's Camp in Battle Street mode:
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Beat the level in the story mode.

Unlock Michael:
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Successfully complete the game in story mode.

Easy character unlocking:
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Play an Xbox Live multi-player game and complete a stage using an unlockable 
character that other players in your group do not have (or vice versa). 
After completing the stage, the player(s) that do not have that character 
will now have that person unlocked.

Imperial Opera stage:
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Successfully complete the game in story mode.

Easy Mode:
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Lose the game three times on purpose and then choose to continue.