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