Airblade - Platform: Playstation 2

To unlock            you have to 
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J. J. Sawyer         Beat the game with an S rank in all levels 
Oscar                Beatthe game with an A rank in all levels. 
Naomi                Beat Downtown with a B rank. 
The Insider          Beat Storage with a B rank. 
Stunt attack mode    Beat the game in Story mode 
Ethan's costume C    Beat the game in Stunt Attack mode 
Kat's costume C      Get a High Score in all levels in Score Attack