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