PAP Quest
Step 1: Solve the Lament Configuration, it is located in the loft of the House, simply walk up to it and interact with it. Upon doing this lightning will strike and the wall will open up revealing a long hallway, walk down this hallway and at the end it will bring you back to the entrance of the house.

Solving the Lament Configuration will also turn on power.

Step 2: Find the entrance to hell. The entrance spawns in the second floor bedroom, the room with the fireplace and mattress on the floor. It will look like a crack in the wall. Interacting with this crack will open up the wall, revealing the entrance to hell.

Step 3: Sacrifice Alters. Located in Hell are 3 Sacrifice alters, each requiring a skull for sacrifice. All 3 of the skulls are located in the House. The first skull is on the mattress next to the entrance to hell. The second skull is in the other bedroom across from that, sat on one of the bedposts. The final skull is downstairs in the living room, on the coffee table.

Each Sacrifice is a 1 minute lockdown in which you must survive a wave of super sprinters. If you down during the Sacrifice you will have to do it again. After completing each sacrifice a blue beam will shoot up towards the top of Leviathan and you will be rewarded a Max Ammo.

After all 3 Sacrifices are complete, PAP will unlock on the bridge leading to Leviathan.


Music EE
There are 3 bottles located around the map. The first is in spawn, sitting on a mattress in the corner of the yard. The second is upstairs in the master bedroom, on the dresser next to the mystery box location. The final one is in the living room downstairs, it is propped up against a lamp in the corner of the room.


Radios
There is a radio in the loft, in the back corner under the window, it will provide a bit of exposition about the Box and what it does.


Film References
There is a TV downstairs in the living room and after the Cenobite shows up for the first time it will turn on showing a picture of a flower, this is a reference to the first time the Cenobites show up in the original Hellraiser where the same thing Occurs.