The Refinery is a room in Brennenburg Castle that can be accessed from the Entrance Hall. It was featured in the Demo, as the second of the three areas included. It is the seventh area explored in the game and the last accessible from the Entrance Hall.
To enter the Refinery you must find the ingredients for the Acid solution and pour the Acid on the fleshy, organic, residue preventing you from entering; after that you can enter. The Refinery is also one of the first areas where you encounter a Gatherer. It won't chase Daniel however (as in the Wine Cellar) unless Daniel quickly runs in front of it. It is impossible for it to attack in the demo however, for it will vanish if the player chooses to run directly to the Gatherer.
The Shadow chasing Daniel has forced its way into this area under the castle. Massive holes with a lot of organic matter are visible above. Don't be alarmed if it roars where you pass the spot where you saw the grunt walking past. Fleshy residue is in random places in every room. You need to take care and watch where you step in this dimly-lit environment to avoid taking damage.
There are six rooms to be explored after the room with the Servant Grunt and the barrels. Tinderboxes, oil, diary entries, and Notes can be found in these rooms. Daniel will experience several unsettling events here, such as hallucinating a gatherer trying to break down a door, or the Shadow blowing open a door with a roar. In the room with the large dining table, the door to the sixth room is blocked. This can be bypassed by a small entrance covered in boxes. You will have to crouch to get in. After that room is entered, you must dislodge the piece of wood from the pulley system, then open the hatch to access the Cellar Archives.
- In reference to a Frictional Games commentary from Thomas Grip, The Refinery, at first, was called Distillery, even though it was the wrong name for this level. You can still see that the refinery's map file's name is 06_distillery.