Guilty Gear Isuka - Platform: XBox

Antarctica stage:
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In arcade mode level 100, defeat Leopaldan to unlock the Antarctica stage.

Play as EX characters:
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In arcade mode level 100 and higher, EX characters will challenge you. Defeat 
them to unlock them.

Play as Kakusei Sol and Kakusei Ky:
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Play Scramble in RK II Factory on the normal difficulty setting. Finish the last 
stage with a score of 1,500,000 or greater. Robo Ky II Substance will appear. 
Defeat him to unlock Kakusei Sol and Kakusei Ky.