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