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