Below you can find the list of all the 54 achievements available in the Divinity Original Sin: Enhanced Edition. All achievements are acquired automatically, by completing various quests and advancing in the storyline.
Description: Meet a talking shell called Ishmashell.
Description: Find the legendary teleportation devices of Rivellon!
Description: Make Esmeralda as your primary suspect.
Description: Find a silky souvenir.
The mirror inside
Description: Solve the Mirror Dungeon puzzle.
Description: Find a fitting job for the unemployed.
The mind is a terrible thing to test
Description: Pass the test! Well, one of many.
I talked with a zombie
Description: Defeat Evelyn and find Councillor Jake.
Description: Kill the ghost of Pontius Pirate.
Description: Get the Fabulous Five out of town.
Is anyone home?
Description: Defeat the four elemental demons.
Description: Pull the wrong lever in the Pontius Pirate's lever puzzle in the Black Cove.
Hey Hey Do The Zombie Stomp
Description: Make Zombie Nick do your bidding.
You and me
Description: Arrange a marriage between Sam and Maxine.
The world needs guts
Description: Find an unconventional job for the unemployed.
Description: Inform Selenia about the source of the undead.
Leave my girl alone
Description: Save Bonnie!
Description: Find a way to open the barrier without harming any mushrooms.
Mister nice guy
Description: Deliver Blossius' will to Marisa totally unaltered.
Into the void
Description: Meet Leandra in Hiberheim.
Forged in fire
Description: Release the elements from Boreas' staff.
Find the White Witch
Description: Find the White Witch!
Caught in the game
Description: Try to sneak past Junius and Bibius...
Note: you have to sneak past (by using the Sneak ability) the two drunken guards on the bridge leading to Cyseal.
Description: Safely return to the surface.
Truth be told
Description: Make Brandon tell you the truth about the mining guild.
Description: Come face-to-face with Mangoth himself.
Description: Make it into Hunter's Edge.
Time to kill
Description: Create a spell that makes Death Knights vulnerable.
Description: Save the Homestead on the Shelter Plane at the End of Time.
Description: Talk to Icara to learn more about her sister's plans.
Feeble screams from forests unknown
Description: Safely enter Phantom Forest.
The one that got away
Description: Free Esmeralda from prison.
You've got that something special
Description: Learn all the skills within one skill tree.
Description: Help Jahan face his demons.
Description: Talked to Catherine Chun
Description: Enter the Source Temple.
Whisky in the jar
Description: Brew a fine whisky for Hershel.
Description: Enter the Gnik Barc Nni.
Description: Find Zandalor.
Skull Crushing Finale
Description: Finish the Trial of Ascension.
Description: Totally, completely, and utterly finish the game.
To hell with the devil
Description: Kill Cassandra to get hold of the soul forge repair ritual.
The Grimmer Twins
Description: Forge the sisters' souls.
Description: Make Archibald king of the trolls.
Description: Solve Bellegar's maze.
Description: Meet the legendary weresheep!
That Voice Again
Description: Give Wolgraff his voice back.
Kill With Power
Description: Finish the game in Tactician Mode.
Stray Cat Strut
Description: Make Arhu a cat forever
You keep me rockin
Description: Keep the Tenebrium for yourself.
Description: Finish the game with the Lone Wolf trait.
Wicked young man
Description: Decide Arhu is better off human.
Never Say Die
Description: Finish the game in Honour Mode.
Sister of Mercy
Description: Teach Madora the value of mercy.