Unholy is an atmospheric horror stealth adventure game featuring 27 Steam achievements.

All non story-related achievements are missable since none of the chapters can be replayed.

Genesis
Complete the Prologue


Homecoming
Complete Chapter I


Passage
Complete Chapter II


Purification
Complete Chapter III


Tyrant
Complete Chapter IV


Overthrown
Complete Chapter V


Innocence
Complete Chapter VI


Heresy
Complete Chapter VII


Guilt
Complete Chapter VIII


Exodus
Complete Chapter IX


Prophecy
Complete Chapter X

Father's daughter
Have a drink while listening to music.
Chapter I: Normal World


(1/2) Start the record player in the living room:



(2/2) Have a drink in the kitchen:





Moms will be moms
Clean Gabriel's room
Chapter I: Normal World


Find the box under Gabriel's bed, clean up the room, and push the box back under the bed:





It doesn't work that way
Shoot an enemy with any projectile
Chapter III: Unholy


Use the slingshot to shoot an enemy (can be done upon encountering the first guard):





Killer
Kill your first enemy
Chapter III: Unholy

Thunder
Get rid of an enemy while remaining undetected
Chapter III: Unholy

Mothers Wrath
Get rid of the enemy that is chasing you
Chapter III: Unholy

Duality Kills
Kill two enemies with one explosion
Chapter III: Unholy


These achievements can be easily obtained upon encountering the first two infected enemies:



You can quit to menu and load the last save to get all four achievements at this location.



Roasted
Kill an enemy using electric fence
Chapter V: Priest Plaza


In the minefield area, use the electric fence to kill the guard:





We can be Heroes
Save a technician who asks for your help
Chapter V: Priest Plaza

No Mercy
Kill the technician asking you for help
Chapter V: Priest Plaza


These achievements are mutually exclusive. However, you can quit to menu after obtaining the first one, and load the last save to unlock the other one. Since you'll receive a Memento for saving the technician, it's recommend to kill him the first time, and save him the second time.

Interact with the lever to save the trapped technician. Ignore the lever to kill him:





Ambush
Kill an enemy that is under the influence of Desire
Chapter V: Priest Plaza


This achievement can be obtained shorty after discovering the 'Desire' crystal:





Fryer
Use the incinerator to kill the guard guarding the statue of the High Priest
Chapter V: Priest Plaza


In the area with the statue of the High Priest, use the incinerator to kill a guard:





Role Reversal
Kill the Hunter
Chapter VII: Church Complex


The invisible Hunters are introduced after obtaining the final mask. Use an explosive to kill them:





Mortal
Die fighting the High Priest
Chapter X: Black Cathedra


Die fighting the High Priest:

Blessing of the Omnipresent
Receive the final blessing


Greedier than Charon
Collect all 15 Mementos



Blessings can be unlocked at shrines using Mementos. To obtain the achievement 'Receive the final blessing' only 12 Mementos are required. However, the achievement 'Greedier than Charon' requires collecting all 15 Mementos. Sometimes, red crystals are required to reach Mementos. Hence, it's recommended to unlock the blessing 'Blessing of the Abundance' as soon as possible.

Please refer to the section below for more information.

Chapter III: Unholy
Father's Letter

After meeting The Stranger / The Crone in front of the first shrine:





Chapter III: Unholy
Hip Flask

After meeting Mother Superior and walking through the area with the two searchlights:





Chapter III: Unholy
Engagement Ring

Shortly after the 'Hip Flask' Memento, after the section with the three guards:





Chapter V: Priest Plaza
Newborn's Identification

At the beginning of the chapter, in the room behind the movable shelf:





Chapter V: Priest Plaza
Burned Bracelet

In the house after the minefield, in the corner of the first room on the right (red crystal required):





Chapter V: Priest Plaza
Picture from College

In the area with the trapped technician:





Chapter V: Priest Plaza
Spring of Eternity Membership Document

Reward for saving the trapped technician:





Chapter V: Priest Plaza
Mother's Sunglasses

In the box next to the corpse with the first 'Desire' crystal:





Chapter VII: Church Complex
Dorothea's Mask

Open the door on the upper floor in the library (code: 3-2-2):





Chapter VII: Church Complex
Dorothea's Medallion

In the guarded area after the library, on the left:





Chapter VII: Church Complex
Letter to Santa Claus

In a locked box (red crystal required) in the main hall:





Chapter VII: Church Complex
Mother's Letter

In the Isolation Ward area (after obtaining the final mask), break these planks (red crystal required):





Chapter IX: Inner Monastery
Gabriel's Rattle

In the box in the room after encountering the first guard of the chapter:





Chapter IX: Inner Monastery
Gabriel's Crayons

Shortly before reaching the train station, in the bathroom on the right (red crystal required):





Chapter IX: Inner Monastery
Little Teddybear

At the train station, between the gates on the ground: