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