Here is the full list of all 47 Vigil: The Longest Night achievements.
Defeat Brood Mother
Defeat the Craving Terror outside the town
Welcome to the world of Vigil: The Longest Night!
Complete Duran's quest
Help Thurber W. Sungi's investigation
Defeat the Ancient Guard once
Beg to Drew 5 times
Don't shake it anymore!
Help James to find the salt
Help August during his adventure
Help Daisy to get the medicine
Defeat Kelpie, the Lord of Tide
Defeat Erupting Flesh Cluster
Defeat Lord of the Misty Lake
Save all miners then talk to Edward
Collect all 7 lost paintings
Find the Golden Slime
Complete Noax's request
Complete the Mysterious Trader's request
Defeat Uptancos
Pass Sister Holly's test
Get the Fallen Eyeball from Hilda
Followed Hilda's words to relieve the seal
Give the Cubic Crystals to the Doctor
Defeat the Evil inside the wood
Give Isabella the ball
Find Hamilton's belongings
Distribute the placebos to the Villagers in town
Defeat The North Princess
Defeat Dephil
Complete the sword skill tree
Complete the axe skill tree
Complete the dual weapon skill tree
Complete the bow skill tree
Complete the survival skill tree
Complete all skill trees
Reach maximum value of Throwing power
Reach maximum value of Arcane power
Collect all arcane items
Get at least one of every weapon in game
Get at least one of every equipment in game (including rings)
Forge 5 weapon/equipment enchanted and reach to +7
Buy Buffe's house
Collect all furniture
Stop the crazy Doctor
Defeat Light Devourer
Wake Daisy's soul inside the Devourer