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