| Achievement | How to unlock
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| - Kill 2 Malthusians within a timed chain attack.
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| - Complete the Challenge Room.
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| - Neutralize 10 Malthusians in underwater combat.
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| - Collect 50% of the medals.
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| - Collect all documents and objects.
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| - Sweep 3 Malthusians off their feet with water.
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| - Kill 5 Mathusians with fire or electricity.
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