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A Legion of Zombies (Silver)
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Kill 500 zombies in one level
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Back with the X (Bronze)
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Witness Rachel joining the group
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Big Brain Brian (Bronze)
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Witness Brain joining the group
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Can't touch this (Silver)
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Complete a Base quest without taking any damage
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Fists of Fury (Bronze)
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Kill a mutant with your fists
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Getting to know each other (Silver)
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Complete all character quests
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Kill a zombie (Bronze)
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Kill a zombie
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Master Craftsman (Bronze)
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Fully upgrade a weapon with any status effect
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The Collector (Silver)
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Complete 'Dev Card Hunt!'
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Thought this was a Zombie Game? (Bronze)
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Witness Luxo joining the group
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Touch Base (Gold)
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Complete 'Return to the Military Base'
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Watch this! (Bronze)
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Use your first Smart Bomb
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