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