Here is the full list of all 41 The Darkest Tales achievements.
Hit a wolf key six times without touching the ground.
Unlock the berserk form.
Defeat Merlin the dragon.
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Defeat all the phantoms in the castle.
End your love story.
Unlock the greatsword.
Unlock the knight armor.
Leave the fish woman speechless.
Unlock the harpoon.
Defeat SCIENCE!
Stop and fight during the speed test.
Unlock the spear.
Use the bats as a flying bridge.
Fulfill all the Jinn's wishes.
Defeat the kid who wouldn't grow up.
Unlock the boomerang.
Defeat the pirate captain and her crew.
Defeat the fairy queen.
Stitch up your wounds 42 times.
Unlock the axe.
Unlock the pirate suit.
Run away from the king and his giant wife.
Use your bow to defeat a zombie egg.
Unlock the bow.
Dodge 9 lightnings at the last possible moment.
Defeat a porcupine tank while it has its shield up.
Complete the first level without skipping any cutscenes.
Defeat the bloodthirsty girl.
Equip your first skill!
Explore the cave under the bed.
Use a teleport mirror to go back.
Unlock the swords.
Unlock the hunter armor.
Lose during the tutorial.
Defeat an enemy while hanging from a wall.
Defeat 9 zombies by offering them some coffee.
Cut 33 poisonous apples on the fly!
Listen to the fish woman's entire song.
Defeat all the rubber duck mini-bosses.
Unlock the shotgun.