King Of Fighters 2002 - Platform: XBox

Random character select:
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Hold Black at the character selection screen. 

Fight as Geese:
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Complete level 40 in the time attack challenge. Then, hold R while 
choosing Billy at the character selection screen.

Fight as Goenitz:
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Complete level 30 in the time attack challenge. Then, hold R while 
choosing Rugal at the character selection screen.

Fight as King:
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Complete the single attack challenge.

Fight as Kusanagi:
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Hold R while choosing Kyo at the character selection screen.

Fight as Orochi Chris:
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Hold R while choosing Chris at the character selection screen.

Fight as Orochi Iori:
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Complete level 20 in the time attack challenge. Then, hold R while 
choosing Iori at the character selection screen.

Fight as Orochi Shermie:
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Hold R while choosing Shermie at the character selection screen.

Fight as Orochi Yashiro:
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Hold R while choosing Yashiro at the character selection screen.

Fight as Shingo:
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Complete the team attack challenge.