Here is the full list of all 37 Salt and Sanctuary achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Aid a despondent thief.
Aid an unraveling sorceror.
Aid a questing knight.
Take an oath to the gods of Fire and Sky.
Bear all possible brands.
Take an oath to The House of Splendor.
Take an oath to The Stone Roots.
Achieve the maximum upgrade level of a weapon.
Defeat the Kraekan Cyclops.
Defeat the Mad Alchemist.
Achieve the maximum devotion level in your creed.
Take an oath to the Order of the Betrayer.
Take an oath to The Three.
Defeat the Queen of Smiles.
Discover your first brand.
Take an oath to Devara's Light.
Claim your first sanctuary.
Take an oath to The Iron Ones.
Defeat the Unspeakable Deep.
Defeat the Sodden Knight.