Here is the full list of all 53 The Last Faith achievements.
Accept the Throne.
Defeat Medeya.
Be consumed by the Cosmic Voice.
Reach the true ending.
Defeat Caterina and Annabella.
Acquire every Sepolcro.
Defeat Lord Laddak.
Defeat Nyxaroth the Eldritch Wight.
Deliver all the Unborn of the Midnight Aristocracy to the Woman in Ink.
Acquire both of Esk’s eyes.
Defeat the Harbinger of Nightmare.
Upgrade any primary weapon to its maximum level.
Deliver all of the blueprints to Mariano.
Defeat Leena.
Defeat the Cold One Beast.
Acquire all Federal Era Belts.
Finish Madelyne and Theodora's quest.
Acquire the Celestial Larva.
Defeat Manfredd the Accursed.
Defeat Lisa.
Defeat the second Starborn Nighthunter.
Defeat the Starlight Beast of Illygarth.
Raise any stat to level 50.
Use the Stigma of Transcendence.
Defeat the Burnt Apostate.
Perform 30 execution moves.
Defeat the Voracious Terror.
Finish Helenya’s quest.
Acquire the Propulsion Boots.
Defeat Yegor and Leena.
Finish Lady Annika’s quest.
Defeat the first Starborn Nighthunter.
Finish Lucyl’s quest.
Spend over 50,000 Nycrux.
Acquire the Nighthunter’s Grappling Claw.
Defeat Edwyn the Shadowscourge Horror.
Acquire the Technological Lens.
Acquire the Gravitational Ring.
Defeat Dr. R. Hermann.
Defeat the Winged Pale Laments.
Kill 100 enemies.
Defeat the Giant Patron.
Defeat the Old Wymond.
Acquire all Healing Holsters.
Finish Aldrich's quest.
Deliver all the dried livers to Lady Dorothea.
Acquire all primary weapons.
Acquire all firearms.
Acquire all spells.
Upgrade any secondary weapon to its maximum level.
Find all notes.
Parry 50 incoming attacks.
Unlocked all achievements for The Last Faith.