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