Hellraiser: Revival — How to Unlock Door M359 With the Blemished Fragment and Blemished Diamond

Door M359 is the first real lock you hit after Aidan Lynch wakes up inside the Scarlet Church compound in Clive Barker’s Hellraiser: Revival. It sits at the bottom of a short set of steps in the holding area, with a diamond-shaped receptacle on the wall to its right. The door will not budge until that diamond is whole, and completing it means reaching into two of the cult’s mutilated body exhibits for the pieces.

Quick answer: Pull the Blemished Fragment from the chained body in the first lit display booth and the Blemished Diamond from the conjoined body in the second exhibit, then use both on the slot beside M359 to complete the emblem and open the door.

Where Door M359 and the two pieces are

Everything you need sits along one corridor off the holding room where you start with the objective “Escape the cult.” There are no enemies before the door, so you can take your time. Both key items share the same description in your inventory, “Should fit into a slot somewhere,” which is the game telling you they belong on the wall plate.

Piece	Where it is	Slot it fills
Blemished Fragment	Chained body in the first lit display booth	Top half
Blemished Diamond	Conjoined body hung before the painted wings	Bottom half

The Fragment goes in the top of the diamond and the Diamond goes in the bottom. The order you collect them in does not matter for the door, but the Fragment is the nearer of the two pickups.

Unlock Door M359

Controls here are the PC prompts: F to interact, with your collected key items showing in the item bar during the lock interaction. Work through the steps in order and you will have the door open in a couple of minutes.

Exit the holding room through its open entrance and enter the brick passage. Take the doorway to your left into a poorly lit chamber, where a mutilated body hangs in chains inside a brightly lit display booth.

The exhibit room with the chained body — The chained body in the first display booth holds the Blemished Fragment. Shown at 14:30 in SHADOW-MAN’s video. Image: Saber Interactive

Approach the body and interact with its exposed chest cavity. Aidan reaches inside and retrieves the Blemished Fragment. Press F to pick it up. If you like, collect a piece of Cloth from the little side table on the right.

Return to the corridor, descend the brief staircase, and approach the heavy metal door bearing the M359 marking. To its right, above the M359 sign, a small vertical plate is set into the wall with a diamond inlay. Inspect the plate using F, then fit the Blemished Fragment into its upper half. The objective changes to “Unlock the door.”

The lock plate beside door M359 — The diamond-shaped receptacle sits on the wall to the right of the M359 door, just above the sign. Shown at 15:09 in SHADOW-MAN’s video. Image: Saber Interactive

Head back up the steps and along the corridor to the second exhibit room. A conjoined body hangs in chains in front of large painted wings. (The wall text along here reads “WE ARE MEANT TO KNOW NOTHING AND FEEL EVERYTHING.”)

The conjoined exhibit room — The conjoined exhibit, hung before the painted wings, holds the second half of the diamond. Shown at 15:55 in SHADOW-MAN’s video. Image: Saber Interactive

Examine the conjoined body’s chest and ribcage. Aidan reaches inside and retrieves the Blemished Diamond. Press F to pick it up. You can also collect Chemicals from the metal cart on the left.

Go to the M359 lock once more, inspect it, and fit the Blemished Diamond into its lower half. With the diamond whole, the door opens by sliding on its own.

How to know it worked

When both pieces are in place, the diamond emblem fills out and the metal door opens automatically. Beyond it, a dark chamber holds another displayed body and a fridge where you can drink Soda and collect Chemicals. Farther on, a ward with a green couch has a brief crouch tutorial, followed by your first cultists, who are holding a prisoner behind bars.

With both halves placed, Door M359 opens into the dark room beyond. Shown at 16:57 in SHADOW-MAN’s video. Image: Saber Interactive

Grab the crafting materials on the way

The rooms near M359 contain what you need for your first Bandages, crafted in the Crafting tab using 1 Cloth and 1 Chemicals. The booth room and conjoined exhibit provide Cloth and Chemicals, while the fridge and the ward just beyond the door give you enough for two Bandages. Coins are scattered throughout these rooms and add to the currency counter in your inventory.

The wooden door near M359 stays locked and is not your route, so don’t waste time on it. With both halves of the diamond placed, the only way forward is through M359 itself.