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