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The Sewers is the eighth (8th) level in Amnesia: A Machine for Pigs. They are accessed through the Tunnels. Several valves need to be operated in order to progress to the Bilge.


The Sewers are one of the more odious and unsettling levels. They feature vast pools of wastewater and presumably fecal matter which litters the water and the walls. The pools are intersected with catwalks and segregated by floodgates.

This Leaking World[]

Oswald Mandus
"Isn't it dangerous allowing this filthy discharge to collect so close to the core?"
The Engineer
"We can use the flow to drive the turbines, there will always be a torrent of excreta flooding through these tunnels. We can use this to supplement the steam production and ensure constancy."
Oswald Mandus
"Dear god the stench. This fecal matter is the true product of the age."
Oswald Mandus, in a flashback, discussing with The Engineer about the discharge in the Sewers.

This is the first place where the player encounters a Failed Experiment. Similar to the Kaernk, this one differs from The Dark Descent's version as it has an electric aura about it. Wretches are also encountered multiple times throughout the level, though this is purely visual and there is no real threat.

As the player arrives in the Factory Sewers, they will hear a flashback where Oswald is complaining about the dirty water in the sewer. There are two valves the player needs to turn to drain the flooding and open Sluice Gate 1 and Sluice Gate 2. Once the floodgates are lowered the player can safely traverse the sewers and once again enter a decontamination chamber to proceed deeper into the sewers, entering the Manpigs' nest.

A grisly spectacle awaits as the Manpigs are seen walking the corridors below and feasting around a table full of meat (including a human torso). The player is in no danger, however, as they are far down below, unable to give chase. As Oswald makes his way deeper into the complex, he comes across numerous cells in which the Manpigs reside while being passive or inactive, some doors have movable lids which allow Oswald to observe them playing, sleeping and so on.

Beyond the cells, the player will descend through a series of pipes, going ever deeper into the bowels until the Bilge is reached.


  • Take the leftside path and to the left entering the small entrance. This entrance has 2 way in the end and a straight path that are blocked by gate for now. Take the right way in the end. Then exiting the entrance, there’s a stairs leading to the flooded floor and to your left is an entrance to the Sluice control room.
  • There is a valve that you can turn to turn on Sluice 1 gate, then the telephone will start ringing for you
  • Going back to the first entrance, half way you will see there’s a gate that are unlocked now on your left. Enter this passage and go through the Sluice Gate 1 and you will back to where you came from. Here make a U turn (or use the bridge) and make your way to the Sluice Gate 2 control on the other end of this room
  • When entering the passage to Sluice Gate 2 control room, you will encounter the Engineer (same as Wretch but stronger) going through another room that are inaccessible. Turn left and enter the control room and turn the valve.
  • Going though Sluice Gate 2, you can now enter the “Decontamination Chamber” and proceed to the next area

Manpig's Nest[]

  • Here you just follow the path to the doorways. In the middle you can watch a rather not so interesting show where Engineer and Wretch passes underneath you and violently hits the Wretch…
  • Enter the room and enter the doors that are unlocked on this room. In the end you will see an entrance to the Disposal Tubes. Don't worry entering the wrong room, Wretches in here are caged

Disposal Tubes[]

The map can be hard to read sometimes so just follow the guide, unless you can read the map better than me

  • (1st level) Take the left path and fall down to the first hole.
  • (2nd Level) Follow the path and to your left in the end, there’s a ladder to climb down
  • (3rd Level) There are 2 path you can take, left and right. In this case I take left
  • (4th or 5th Level?) The path leads you to 2 ladder, 1 ladder on your right goes up and the left one goes down. In this case I take the left ladder
  • (6th Level) Once going down, enter “From Tide to Spine
"Do you see, Daniel? A whole other world – isn't it beautiful?"
The following section is written from an out-of-universe perspective.
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Found Documents[]

  • October 22nd 1899 – At the very start of the Sewer, head right. It's on the floor next to a skeleton.
  • August 1st 1899 – It's on a table in the room with the first valve.
  • February 17th 1899 – In the room with the second valve, on a shelf on the right side of the room.


These are all the phonographs found in the Factory Sewers:

Found in a dead-end passageway in the Sewers.

"But we can save them, we can set them free, we can replace a rotten old world, with a clean new one!"
Professor A
"Mr. Mandus, you sound every bit the fanatic."
"Well how can I be otherwise Professor? How can any man of ethics simply stand by and watch this world drown in its own excrement?"
Professor A
"And your Engineer, this visionary with whom you embarked upon this course. Does he share your views?"
"Indeed he does, indeed he does! The poor fellow has seen it all before, now this is not the first great civilization he has wept for."
Professor A
"And so you set about things immediately upon your return."
"Naturally, naturally, these things cannot be left to rot upon the tree, and sponsors were remarkably easy to find. I tell you Professor, a trail of greed brings rich men to your door, like pigs to truffles!"


  • The music Dieses Herz is constantly played with a phonograph in the Manpig's nest. This was a measure to calm the Manpigs, as stated in this document.