Finish the game with rank S.
Finish the game on Hard difficulty.
Finish the game without combining herbs.
Finish the game without saving.
Finish the game without using a First-Aid Spray.
Finish the game without using a recovery item (including Green Chemicals).
Defeat an enemy with a critical-hit headshot.
Defeat an enemy by burning them.
Defeat a zombie by stomping on them.
Create a Molotov Cocktail.
Change into a costume.
Attack an enemy to save your partner who is grappling with that enemy.
Defeat an enemy with a knife.
Destroy a zombie's legs.
Read all files.
Obtain all keys and use them all.
Combine every type of herb with each other.
Obtain all weapons.
Try to push something heavy with Rebecca.
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