Scurge - Hive - Gameboy Advance
Boss Rush Mode:
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Successfully complete the game under the hard difficulty setting.
Costume Option:
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Successfully complete game under the normal difficulty setting.
Hard Difficulty:
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Successfully complete the game under the normal difficulty setting.
Insane Difficulty:
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Successfully complete the game under the hard difficulty setting.
Ultra Mode:
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Successfully complete the game under the insane difficulty setting.