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