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