Here is the full list of all 40 Archvale achievements.
Store over 10,000 gold in the bank.
Defeat the Old King.
Reconstruct the gateway to Archvale.
Fully upgrade a weapon.
Equip a shark cap and mermaid tail.
Obtain Avarn's Sword.
Collect all healing flasks.
Collect all Heart Containers.
Defeat the Banished Executioner.
Obtain the best potion recipe.
Cash in 10 treasures.
Defeat the Colossal Skullbot.
Collect every badge.
Complete every trial.
Defeat the Grove's Blight.
Defeat the Sunken Queen.
Assemble the Arch Lexicon.
Defeat the Fallen Pharaoh.
Defeat the Queen Duneworm.
Defeat the Rotted King.
Survive the ritual of the Molten Rift.
Defeat Frankenslime.
Complete half of your badge collection.
Craft 30 items.
Destroy the barrier guarding Tanglegrove.
Defeat the Exiled Wizard.
Defeat the Soul Serpent.
Own 8 hearts.
Enter the Twisted Caverns.
Defeat the Ghost Crab.
Defeat 1000 enemies.
Restore 10 fountains.
Defeat Mongo.
Perform five consecutive dashes without stamina recharging.
Obtain an improved healing recipe.
Complete your first trial.
Defeat Maxilla.
Defeat the Great Slime.
Die.
Find the village of Timberwell.