| Achievement | How to unlock
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| Allergic to First Aid Spray (25 points) | Finish the game without using a First-Aid Spray.
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| Apprentice of Unlocking (15 points) | Obtain all keys and use them all.
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| Burned Alive (15 points) | Defeat an enemy by burning them.
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| Dead, Dead, Deadski (15 points) | Defeat a zombie by stomping on them.
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| Fashion Plate (15 points) | Change into a costume.
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| Fileophile (15 points) | Read all files.
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| Find Time to Combine (15 points) | Combine every type of herb with each other.
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| From Zero to Hero (25 points) | Finish the game on Hard difficulty.
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| Guns are Too Quick (15 points) | Defeat an enemy with a knife.
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| Here I Come to Save the Day (15 points) | Attack an enemy to save your partner who is grappling with that enemy.
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| I Could Shoot, You Know (25 points) | Obtain all weapons.
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| I'm a Medic, Not a Bodybuilder (15 points) | Try to push something heavy with Rebecca.
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| Misdirected Hostility (15 points) | Destroy a zombie's legs.
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| S is for S.T.A.R.S. (25 points) | Finish the game with rank S.
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| Save Your Prayers (90 points) | Finish the game without saving.
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| This is How You Recycle (15 points) | Create a Molotov Cocktail.
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| This is Serious Business (90 points) | Finish the game without using a recovery item (including Green Chemicals).
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| Who's Got the Herb? (25 points) | Finish the game without combining herbs.
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| Zero In (15 points) | Defeat an enemy with a critical-hit headshot.
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