Here is the full list of all 40 Archvale achievements worth 1,000 gamerscore. It takes around 8-10 hours to unlock all of the achievements on Xbox One.
Defeat the Old King.
Rebuild the gateway to Archvale.
Craft 30 items.
Collect all Heart Containers.
Collect all healing flasks.
Defeat the Sunken Queen.
Collect every badge.
Complete every trial.
Obtain Avarn's Sword.
Defeat the Banished Executioner.
Equip a shark cap and mermaid tail.
Complete the Arena Challenge.
Cash in 10 treasures.
Store over 10000 gold in the bank.
Obtain the best potion recipe.
Defeat Groveblight.
Assemble the Arch Lexicon.
Fully upgrade a weapon.
Die.
Survive the ritual of the Molten Rift.
Complete half of your badge collection.
Defeat the Rotted King.
Destroy the vine barrier blocking Tanglegrove.
Defeat the Soul Serpent.
Defeat the Exiled Wizard.
Defeat Frankenslime.
Enter the Twisted Caverns.
Defeat the Ghost Crab.
Defeat the Fallen Pharaoh.
Defeat 1000 enemies.
Own 8 hearts.
Defeat the Queen Duneworm.
Perform five consecutive dashes without stamina recharging.
Defeat Mongo.
Repair 10 fountains.
Defeat Maxilla.
Obtain an improved healing recipe.
Defeat the Great Slime.
Complete your first trial.
Find the village of Timberwell.