Here is the full list of all 41 The Darkest Tales achievements.
Unlock the berserk form.
Defeat Merlin the dragon.
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.
Stop and fight during the speed test.
Defeat SCIENCE!
Unlock the spear.
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.
Defeat an enemy while hanging from a wall.
Unlock the axe.
Stitch up your wounds 42 times.
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.
Use the bats as a flying bridge.
Defeat the bloodthirsty girl.
Use a teleport mirror to go back.
Equip your first skill!
Defeat a porcupine tank while it has its shield up.
Explore the cave under the bed.
Unlock the swords.
Lose during the tutorial.
Unlock the hunter armor.
Press
Hit a wolf key six times without touching the ground.
Complete the first level without skipping any cutscenes.
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.