The Missing Bell Puzzle is an important objective that you must complete in Hellraiser Revival to progress the Hunt Marlowe mission. This is a fairly difficult puzzle to complete, not due to the nature of the puzzle, but because it involves defeating a boss to get a key item. So, you will definitely want to be prepared with enough ammo for the fight. Meanwhile, I will show you where to find the Missing Bell puzzle and how to complete it.
Hellraiser Revival Missing Bell Puzzle Location

I have marked the location of the puzzle in the above image with a red circle. Moreover, Zora’s shop (along with a save point) is just nearby too, which is the green circle in the above image. You can save here first before progressing with the mission.
Hellraiser Revival: Where To Find Missing Bell

Follow the directions that I have indicated in the map picture above. The red circle is the starting point (the puzzle itself), while the green circle is the place you have to get to.
Facing the Bell Puzzle, turn right and walk forward. Walk until you reach the end of the path, and turn right. You will see a door into another room.
However, be careful before entering here, as there will be three Cultist enemies in here. You can use whichever method you prefer to take them down.
In this room, there will be a door that leads towards the green circle indicated above. However, before you head through this door, I would suggest that you head to the blue circle to collect some ammo. There are no obstacles or enemies in this room, so it is just some extra ammo that does no harm. Moreover, this is useful as you will be walking into a boss fight soon.

Now, head to the spot mentioned above and open the door. You will see a hole in the wall to jump down from. Before you jump down, make sure to save at the point shown above.

Afterwards, feel free to jump down and walk ahead. Go through the door, and you will see a box lying on the table on the right side of the room (I have marked the box in a yellow circle in the above image). Pick it up to inspect it, and turn it around.
On the backside of the box, there will be a key that unlocks the box. This will give you the Missing Bell for the puzzle. Afterwards, turn around and leave, or at least try to. This will start the Bruno boss fight.
After finishing the boss fight, you will lose the Genesis Configuration and be able to go back up to the previous floor with the puzzle.
Hellraiser Revival Missing Bell Puzzle Solution

This is a very simple puzzle to finish once you find the missing piece. Simply place it down in the fourth spot and arrange it in the pattern shown above. This will complete the puzzle and let you continue with the story.




