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