Release

Perfumer warns Marked One that Doctor has been taken captive inside the Last Day base in Dead City. His contact inside their ranks, Duda, is asking for a bribe in the [ school building] with the columns.
==Walkthrough==
=== The deal ===
Walk into the school, avoiding the central square. Take the route on the picture below to avoid being seen. Being detected by the bandits is fine, but some of them will follow you inside.
Talk to the guard at the entrance to let you pass. On the second floor, Doctor is being held in a room by the toilet, guarded by a Last Day member; as you approach, two invisible Last Day troopers come out of the toilet. Doctor only spawns if you enter the room, and for that Duda can be found in another room; speak to him. He's asking for 500000RU to release Doctor and betray Last Day. You have two options:
Pay the bribe:
* Talk to guard blocking the entrance to Doctor's room, enter the room to spawn Doctor, and talk to him. He will leave to a safe location back at Perfumer's. As soon as he arrives at Perfumer's, Duda will disappear and his squad will turn hostile. If you are only paying to keep Duda alive, don't bother, as you won't see him ever again.
Refuse to pay:
* Duda will warn you to clear out. After a minute, he and his squad will turn hostile, and you will be able to wipe them out. Walk into Doctor's room to spawn him. Hand him the Cloaking exosuit and Colt M16A2 "Anomaly" in any condition (Norman advised you to take it into the Dead City). No battery or ammo needed. Doctor will leave to Perfumer's invisibly.
=== Fighting Duda's squad ===
Duda's squad consists of 16 soldiers total, both Last Day and mercenary forces. Beware the two fully cloaked soldiers who only spawn when you wander close enough to Doctor's room, and three fully cloaked soldiers who spawn when approaching the other side of the building, opposite of Doctor's room.
After Doctor departing to safety, Perfumer's other Last Day contact, Sparkle, will shut off the protective field. This opens the rest of the map for you to explore and fight on. She will pay for that - her last message is a call for help as Last Day convoys her through the sewers to the unknown direction.
As Doctor arrives at Perfumer's, additional Last Day turrets and troopers will appear across the city. Beware of being caught in the middle of the city when they spawn. Perfumer will urge you to run to the Last Day [ headquarters building], and Lightning will taunt you and dare you to come into the workshop at the second floor of the [ storefront].
=== Fighting the rest of the Dead City ===
Approximate schematic of the turrets and snipers is presented on the picture below. Watch out for the one with an RPG-7, and three others with Modified Gauss Rifles.
Kill the 26 Last Day soldiers that spawn around the area. Most are aggressive and will attempt to close in on you wherever you are, making buildings with good cover extremely advantageous. The school serves well to take out the vast majority of them.
Watch out for the RPG-7 user on the roof of the workshop as he has a very advantageous position and infinite ammunition. He can also be baited into killing himself by accident. Additionally, be cautious of three Modified Gauss Rifle users shown on the picture above.
Five of the Last Day soldiers spawn three random mutants around you when they die. The screen will flash white and shake for a few seconds, making precise shooting hard. Two of those mutant spawners are snipers at the [ storefront roof], other three are in the [ administration building].
The mutants can be any from this list: Zombie, Witch, Gopnik Zombie, Exploding zombie, Parasite, Karlik, Small plague fly. (with the regular Zombie having the priority)
=== Storefront ===
Head into the [ storefront] and look for the workshop on the second floor. As you enter, a cutscene plays with Lightning escaping through the teleport. Three fully cloaked soldiers will spawn behind you, so be prepared to take cover.
Perfumer contacts you, and says to look for a note from Sparkle in the [ city administration building].
=== Headquarters ===
Two regular soldiers will immediately spawn in when you enter the building, one on the ground floor and one up the steps.
Two more soldiers will spawn in after you enter the second floor. One is fully cloaked and hidden in a back room, and the other will be using a Modified Gauss Rifle.
One mutant spawning soldier will appear at the top of the staircase if you try to go to the roof, and two additional mutant spawning soldiers will appear on the roof once you arrive there.
Look behind the Lenin's head on the first floor to find Sparkle's Note. Pick it up. Perfumer will walk in and want to talk about the teleport detailed in the notes. Sparkle's note will contain the coordinates; using the Positioner Norman gave you earlier, find these coordinates. They lead you to the teleport in front of the [ school building].
Before continuing, make sure you are absolutely prepared for a very long combat mission with dozens of human and mutant targets. Also, wipe X-10 from natural spawns to make the mission much easier.
The teleport leads you into the underground sewers. A harmful anomaly blocks your path - you can only pass if you maximized your Impact resistance with artifacts. There are a bunch of explosive cylinders and barrels - detonate them from the distance, because they'll blow up when you're walking through them anyways.
After you reach the end of the tunnel, you will receive the Dead City - Bunker D-6 transition. Perfumer and Norman will contact you with the intention to go with you.
==Notes==
* Colt M16A2 "Anomaly" can be obtained from either invisible Monolithians or Veteran-ranked random stashes. A guaranteed one can be found in a [ sawmill stash] in Zaton.
* Despite being another anomalous weapon, AK-9 "Spiderweb" is not a valid weapon to give Doctor for his escape.
* In the large fight, try to finish looting bodies before saving or loading the game. Loading can cause corpses to be culled before you can get to them.
* After passing through the sewers, Yuri Semetsky in Limansk will have a unique exchange dialogue. However at the same time he becomes killable, so you can accidentally miss the item he offers, especially in the quest Breakthrough in which a large amount of enemies spawn and can kill him, so make sure to finish that quest before heading to the sewers if you want the item he offers. Semetsky himself is not an essential NPC and isn't involved in quests besides Wanderer in which he initially appears.
==Bugs==
* The city administration building is full of semi-fake walls. The soldiers will clip halfway through the walls and shoot you through them, especially if you're outside of it.