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.
Take an oath to Devara's Light.
Take an oath to The Stone Roots.
Take an oath to The Three.
Bear all possible brands.
Achieve the maximum upgrade level of a weapon.
Aid an unraveling sorceror.
Defeat the Queen of Smiles.
Defeat the Kraekan Cyclops.
Discover your first brand.
Defeat the Mad Alchemist.
Defeat the Sodden Knight.
Claim your first sanctuary.
Take an oath to The Iron Ones.
Defeat the Unspeakable Deep.
Aid a despondent thief.
Aid a questing knight.
Take an oath to the gods of Fire and Sky.
Take an oath to The House of Splendor.
Take an oath to the Order of the Betrayer.
Achieve the maximum devotion level in your creed.