| NOTE - This mission can be quite a challenge to complete with no kills or alerts, so make sure you save often. |
When Samuel drops you off, head up the stairs and use the chain to climb to the next section. This section has 4 guards, one of which is stationary and the other 3 are moving. Your goal is to get to a door that is behind the stationary guard, on the wall and to the left.
Once you get to the door, go inside and make sure to close it behind you. Go up two floors and grab the Warehouse Key off of the desk, then go down one floot and use it to open the door. There are four or five guards in this section, so make sure you keep an eye on them all. Use Blink to go from light pole to light pole until you get to the end. The door straight ahead leads to the Drawbridge Way.
DRAWBRIDGE WAY
As soon as you enter this section, hide along the wall to the left while you wait for the two enemies to finish talking and split up. One of them is Pratchett, who has a key to a small chest inside his home, but it only contains some coins. It also has a safe, with the combination being hidden in three paintings. Use the roofs to get across until you get to the bridge.
Right before the bridge is a little open area, and your introduction to the Arc Pylons. If you get into range, they will shoot some electricity at you, which hurts a lot. If you wait a while, you'll get to see what they do first hand, as the thugs outside of the gate will rush in, only to die.
DISABLING SPOTLIGHTS
If you go along the left side, you can use Blink to get inside of a gate and down some stairs. Of course, you can't do much down here, but the main purpose was to get past the Arc Pylon. Being mindful of the guards, climb up the boxes and use Blink to get onto the metal walkway that leads into the bridge.
There are another two guards inside here, but what you want to do is go out the door opposite the one you entered and take out the whale oil, which will disable the Arc Pylon on the level above you. Go upstairs, being mindful of the guard near the Pylon, and continue going upstairs.
Keep going upstairs until you encounter another guard, so take him down and find the nearby switch to raise the bridge. Get up on top of the bridge and go across, using Blink to get to the next floor once you're across. Head inside the nearby room and take out the two whale oil canisters to disable the spotlights.
TO SOKOLOV'S HOUSE
Now that the spotlights are out, you need to start making your way down to the ground level. It will extremely helpful to disable the Arc Pylon on this side, too, just in case. Once you have touched ground, you will want to head to the left side, as there's a walkway you can use to sneak past the guards, as well as get to lower ground. Do not worry about the thug trapped in a cell at the bottom, as he isn't needed to do anything related to the mission and is completely optional.
Once you get near the water, be careful of the River Krusts, which will most likely be your first encounter with them. They spit projectiles at you, and can only be killed (doesn't negate Clean Hands achievement/trophy) once they start attacking. Go up the stairs and over the gate, then through the marked door to continue on to the next area.
This next area has around 4 guards patrolling the area, one of which walks along a walkway above the ground. There is a Wall of Light separating the exit of this area, and the whale oil canister is blocked off by a rotating wheel, with the switch to stop it on the walkway mentioned above. It is definitely better to take out the other guards on the ground, and you can hide the bodies in the room that's separate.
Once you have taken down the guards and hit the switch to stop the wheel, head through the now stopped wheel and disable the Wall of Light. You can now get to the marked door, which will lead to the final area, and Sokolov's house.
ABDUCTING SOKOLOV
When you first enter the area, you're in a pretty desolate area, as there aren't guards in the immediate vicinity. Go forward and take the first right to find some stairs. Blink onto the roof and use the tops of the buildings to get closer to Sokolov's house.
There are a few ways to get inside of the house, one of which involves the front door, but that's guarded by a few guards. You can also get through a pipe at the bottom, which leads to the wine cellar, but that involves getting past a bunch of guards, as Sokolov is on the top floor. That leads you to the best choice, especially for a Low Chaos playthrough, as it involves going onto the roof and only has one guard.
There's a chain leading up to the roof, that's just hanging there, and there's one guard patrolling up here. Use a Sleep Dart to knock him out, then Blink to the chain and jump onto the roof. Go through the nearby door and sneak up on Sokolov, choking him to knock him out.
Once you grab Sokolov, start heading back down towards where Samuel is. Be careful of other guards on your way down, making sure to stick to the roofs. Once you get to Samuel, tell him you're ready to leave and that puts an end to this mission.
