This is a new kind of walkthrough guide, based on the main story and my impresssions as the character of Iohann Katomskiy. If you want just to know how to complete the shelter quest, then pay attention only to the highlighted text starting with 2. But if you want to dive into the history of Vault 75 and the hidden memories of Iohann Katomskiy - enjoy reading a whole new story.

And please write your opinion about this format under the guide!

17 years have passed since my emergence to the surface, I again found myself in Malden. Frighteningly too little of my surroundings remained in my memory, only that I ran away from here with bleeding feet, in a completely moonless night. Behind me I heard only shots from semi-automatic rifles and security guards` screams. Of the entire destroyed city, only one building stood out, forever fixed in my head - the Malden Middle School (photo 1). I studied here before the war. But in one moment teacher told us not to panic and follow him into the basement. There we saw something strange. Something what we expected not at all: instead of cobwebs in the corners and dampness among the storage boxes we saw a huge door. But it was not leading in an ordinary house, this door was gear-shaped (photo 2) and opened with a squeal as soon as we came closer...

We went inside along a retractable bridge and found ourselves in front of a crowd of doctors, security guards. Behind them stood a man in a blue jumpsuit with the numbers 75 on it. One of the doctors, who called himself Dr. Winston Carmel, showed us a map (photo 1) and explained that the arrow on the map is us at a given moment in time.
He asked us to follow him to the elevator (photo 2) to do the initial examination, after which I only heard the door of the shelter slam, and something loudly exploded outside, as if the sun had fallen from the heavens. The elevator door closed...
After passing the examination, all the children were invited to show their future home but.....except me. Dr Carmel said to follow him. I saw a room where there was only a bed, a terminal, and a bunch of wires. As soon as I entered there, the door instantly closed, and a voice appeared in my ears,which told me to lie down on the bed and attach all the wires to the right side of my neck. After that, I only heard a squeak, and my vision went dark...

Present:
When I entered the basement, I realized from the symbols on the walls that the shelter was filled with gunners - it was a bad sign! I got out from the elevator and went straight, but then I suddenly glanced to the right, I realized that I couldn’t go further, because to get in I need to Find A Lab Card (Photo 1) Earlier, son of Dr Carmel - Hue owned this card, but now...
I entered in Atrium of Vault, where I had to deal with crowds of gunners, but, fortunately, they did not have much experience in fights. The guys were fans of drugs, so there were a lot of them here.
On the second floor I found the terminal in the corner of classroom, where almost all the entries were deleted, but the last one contain a story about Sue and Roy - children who once asked the Overseer about the surface. She told them about the horrors happening on the surface, about the poor people who need help! When the children asked who would become their protectors, the Overseer answered - you..." Then I just wandered around the shelter, stopping to inspect abandoned containers with ammunition and first aid kits, until I ended up in a strange place that looked like a training ground(photo 2). After killing the annoying gunner, I decided to take the challenge and its ending led me to a small tool box, opening which I found a Lab Card

I returned to the door with the Lab card and opened it, sighing with relief, I entered it, but the difficulties did not end there - in front of me was another door with a lock that required an Admin Card(photo 1) I turned 180 degrees and ran through the only accessible door, as it turned out, that’s what I needed, because then turning left and crossing the glass bridge, I again heard the voices of the gunners - perhaps it was one of the main ones... I opened the door(photo 2) and saw a gunner with heavy armor. I killed him silently with his assistant and took the card(photo 3) Bobblehead "Science" smiling at me from the table and I get him to my collection

I again found myself in front of the locked door and opened it with the hope of finding answers to the questions that I had suffered from for many years. I walked up the stairs, glanced at the Chief Scientist`s terminal and enter in the Overseer`s room(photo 1), but most of the terminals were broken... Some gunners staired at me with mad eyes, but I quickly forced them to sleep forever! I actively began to search in the corners, hoping to find the place where they kept me, but everything was in vain. Only that I found was an Overseer`s bedroom (photo 2) Grognak The Barbarian 5-«Demon slaves, Demon Sands» and key from Overseer`s safe. I opened the safe, get some values and started to search information in last terminals...

The mission of Vault 75, above all, is the refinement of human genetics. In practice, this was embodied in the improvement of all body functions through the methods of selective breeding, hormonal therapy, genetic modification, accelerated generation cycles and intensive training.
Children were forced to exercise on simulators(often with danger to their health), and a lot of attention was paid to the development of the mental abilities of the experimental subjects and combat training.

Vault 75 had an important tradition - a kind of “graduation day”. When the subjects reached the age of 18, after the final tests, they allegedly “went to the outside world,”
but the reality was much darker. Those who met the set of requirements were killed, and their genome was studied and passed on to the next generation of children. Those “graduates” who did not meet the physical requirements, but showed a high level of intelligence and obedience, could, by decision of the Overseer, be offered to join the secret staff
-observers. Ordinary test subjects did not even know that there were other people in the Vault besides them and the Overseer. Subjects who did not meet all the requirements were cremated, as were candidates who rejected the offer to join the staff.

"I couldn't find any information about myself other than the word "Vault 95" because a fire occurred in archive, destroying the results of work for many years... Luckily, I knew where I need to go next!"

Thank you for reading this guide, you may be interested in our other guides:
https://steamproxy-script.pipiskins.com/sharedfiles/filedetails/?id=3287539670
https://steamproxy-script.pipiskins.com/sharedfiles/filedetails/?id=3297082983
Special thanks to kaishark and Lagertha for their support.