Achievement | How to unlock
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Beyond | Complete game on any difficulty.
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Boss time | Kill Juggernaut boss.
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Easy survival | Survive 3 waves in survival mode.
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Hard survival | Survive 20 waves in survival mode.
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Medium survival | Survive 10 waves in survival mode.
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Monster | Complete game on insane difficulty.
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Rockets everywhere | Find a rocket launcher.
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Shotgun fun | Find a shotgun.
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Temple | Complete level 6 on any difficulty.
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Warrior | Complete game on hard difficulty.
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