1. Talk to Ellie Fillmore.
Ellie will say that recent events have slightly disrupted their schedule and now task number one is to launch the reactor that Sean spoke about as soon as possible.

Our task is to go to the Mass Fusion building and get a beryllium impeller. This contraption will increase the power of the reactor and allow it to be launched faster than planned. We take the elevator, which is located in the center of the Institute to the top floor.

2. Teleport to Mass Fusion.
When you enter the teleport, you will see a message: “If you teleport to Mass Fusion, you will forever become an enemy of the Brotherhood of Steel.” We answer in the affirmative.

3. Find a beryllium impeller.
You will be teleported to the roof. There will be several brotherhood knights there, including some in power armor.

How to deal with them, take the password of the “Mass Fusion” leader and the ID of the “Mass Fusion” leader from the desk.

We go up to the second floor to the research laboratory terminal. We open the document dated 07/30/77 and see that the impeller is installed in the main reactor at sublevel 01.

4. Infiltrate the reactor level.
We jump into the elevator and go down shooting members of the brotherhood.

5. (Optional) Restore power to the elevator.
The guards will turn off the electricity. We find the switch and turn it back on.

But before you get into the elevator again, run along the terminals and pick up the Science Test magazine on the table, it will give you “Energy weapons deal 5% more critical damage.”

6. Unlock the reactor.
We get into the elevator again and go down to the floor with the main reactor. There, first you find yourself in a purification chamber, which rids you of radiation, and then the doors to the reactor itself open.

7. Pick up the beryllium impeller.
I passed this place like this: as soon as the door opened, I ran to the top (this place is in the screenshot below) and injected myself with 3 antiradin and 3 stimulants there. Here the radiation level is 97.

Having reached the reactor itself, he injected the same dose again. The radiation level here is 157.

He pressed the button, injected 2 more antiradin and stimulants. He took the impeller, ran a little back, gave 2-3 injections again, jumped down, ran into the cleaning chamber and pressed the button to close the doors. And only now, when I am writing this article, I thought that it would be good to take a rad-x before entering the room with the reactor..

8. Eliminate security at the reactor.
As soon as the doors to the cleaning chamber open, the turret on the ceiling is activated - kill it and immediately throw a mine at the place where I am standing in the screenshot below. And run to the room under the stairs that I’m looking at.

Because a security robot will attack you. This is probably the most dangerous enemy in the entire game. He will lose part of his health by running over your mine, and the rest will be destroyed by shooting at him with an RPG.

As soon as you kill him, two assault guns will attack you (we already fought with one of these when we went to get the serum for Virgil). The strategy here is this - after the death of the guard, immediately inject yourself with stimulants, run out of this room and throw a few more mines at the same place. Then return back to this room and wait for the damaged assault guns..

I recorded a video of the passage of the reactor and the battle with the security robot after it.

9. Leave Mass Fusion.
We take the elevator down to the first floor. On the way to the elevator, you may encounter a robot and one turret on the ceiling.

10. (Optional) Help the Institute agents in the lobby.
Although this is not a mandatory part of the quest, I advise you to help. You won’t have any particular difficulties there, but you will collect clothes and cartridges from corpses.

11. Talk to Ellie Fillmore.
We teleport to the Institute, run to the higher systems room and turn in Ellie’s quest. For this task we will be given 708 experience. The quest is completed!

Next quest: Trapped

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It is important to remember that if you have established friendly relations with the Brotherhood of Steel during the game, then during the course of the task you will become an enemy to them. If you inform the Brotherhood about the purpose of the task, ties with the Institute will be severed and a task called War Booty will begin.

Also, before the Mass Fusion mission in Fallout 4, do not forget to buy ammo, stimulants and grab power armor, since you will have to shoot a lot and at the same time you will come across several Brotherhood knights on the way, also in power armor. And finally, buy all the anti-radiation drugs, since during the task you will have to get into a room with a high level of radiation.

Walkthrough:

After the meeting ends and the quest “A New Face of Humanity” closes, you will be told that you need to talk with Dr. Ellie Fillmore, who will tell you about a raid on the Mass Fusion building where you will have to extract the core from the reactor - it should solve the institute’s problems with electricity for many years. After finishing the conversation, follow to the center of the institute, where the elevator is located, and ride it up to end up at the room with the teleporter from where you came out the first time.

Reconsider your decision, as after clicking on the "Use Relay" option, you will become sworn enemies with the Brotherhood of Steel!

As a result of teleportation, you will find yourself on the roof of the building - here, almost from the first steps, you will be faced with rather tough resistance from scriptors. Having gone under the roof, you will find a room with stairs and an elevator - we go to the stairs and before reaching the room with the marker, we look at the table on the right. There you will find a pass (ID card) and a holotape with a password (it will help open the terminal on which the marker is placed).

Having opened the terminal, you will receive the task to go to the basement, after which we leave the room and take the elevator down. Be careful, because during the descent you will be attacked on different floors and you will get stuck on one of them. Here you will have to jump out of the elevator and run - your goal is a rusty switch on the wall. Turning on the elevator again, return to it and go down.

You end up in a basement with a wide window that looks out onto the reactor core. There will be a door on the left, which you need to go through (if you ignored the advice about armor and did not take it, then the suit, which is located in the box next to the door, can more or less protect you from radiation). Having entered the dressing room, we press the button and activate the cleaning, after which you need to act quickly - when the door opens, you will begin to receive radiation at a stable rate of 30 units per second. We go to the right, onto the stairs, press the lever at the top and remove the core, after which we run back as quickly as possible and simultaneously destroy the stocks of stimulants with antiradin. We press the button and the doors close.

At the last stage, you need to be extremely careful, as a robot with a Gatling laser and a Protectron will come towards you (it’s better to stay in the same dressing room - a large robot will not pass here, and the Protectron is not that strong). After their destruction, there will be a second wave of two stormtrons, from which it will be better to run away and watch when their lasers on their heads are charging.

Having killed them, you will have to destroy a couple more turrets on the way and get into the elevator again - on the first floor another showdown between the Brotherhood and the Institute awaits us (here you can help or just run to the exit and move on). This concludes the Mass Fusion quest in Fallout 4.

Mass Fusion - Fallout 4: complete passage of the quest for the Institute + video. Note. Completing this mission will break even the strongest and most friendly relations with the Brotherhood of Steel. If you would like to remain loyal to the Brotherhood, then you must inform them about this task. This will automatically fail the Mass Fusion quest and trigger the Spoils of War mission.

Walkthrough of the Mass Fusion quest

Go to the top of the Institute and use the teleporter to travel to Mass Fusion. Get ready to fight members of the Brotherhood of Steel. Follow the marker on the map, which directs you towards the research laboratory terminal. Get the password from the holographic recording nearby and don't forget to pick up the ID card from the nearby table. Using the terminal, find out that the next destination is in the basement. Jump into the cylindrical elevator and ride it down.

Follow the markers on the radar to the key Mass Fusion laboratory, and then go into the laboratory itself. After the disinfection procedure is completed, go to the room with the reactor and unlock the object. Take it and take the elevator back. Leave the building, return to Ellie Fillmore, in a conversation with whom you will complete the quest.

In this small guide you will find the passage of one of the most difficult story missions in Fallout 4 - "Mass Fusion". But before completing this mission, it’s worth thinking about: do you want to leave the institute safe and sound, but at the same time lose your friendship with the Brotherhood of Steel? If you like the second faction, then when this quest occurs you need to contact the paladins and tell them about the purpose of the quest. In this case, the quest will be interrupted and a new mission will begin - “Spoils of War”. But we'll talk about it another time. Now you will find yourself completing the Fallout 4 "Mass Fusion" quest, available if you decide to support the Institute.

Start

Before starting a task, you need to find it somewhere. However, this is what usually happens in the game Fallout 4. Where does “Mass Fusion” come from? This quest will appear after completing the mission “A New Face of Humanity”. After the end of this mission, the player will receive a message that he needs to contact Dr. Ellie Fillmore, who will tell about the raid into the Mass Fusion building. In this location you have to remove a nuclear reactor, which will provide the Institute with electricity for many years. After talking with Ellie, go to the center of the Institute, go up using the elevator, to the teleport that led you to this building.

Preparing for the mission

Before completing this task, you should seriously stock up on first aid kits, ammunition, strong armor and lethal weapons. After all, completing the Fallout 4 "Mass Fusion" quest will make you the sworn enemy of the Brotherhood of Steel, and this is quite a formidable opponent. It is also extremely necessary to take with you a large amount of anti-radiation drugs and appropriate armor, since your path lies through rooms with a large background.

Let's go to our destination

Using the teleport, the main character will find himself on the roof of the building, and from the very first second he will have to engage in a rather heated battle. After the battle, go to the room with the stairs and elevator. To go further, you need to find a pass and a hologram with a password, without which it is impossible to continue the Fallout 4 “Mass Fusion” quest. Where is the pass? Finding it is quite simple, it lies on a table decorated with the building's logo, and there is also a cassette tape with a recording nearby.

It is worth noting that these items can only be found when completing the “Mass Fusion” story mission. And if you, while traveling through the wasteland, accidentally wandered into this building, then you will not be able to go further than the elevator, because the card with the password appears only with the quest marker.

Looking for a reactor

Go to the terminal with the marker and open it using the password. After reading the message, you will receive a task to go down to the basement. This can only be done using an elevator. This will be a rather difficult descent, because the mechanism moves very slowly, and the paladins of the Brotherhood of Steel will attack you from all sides. This is where all your supplies of ammunition and first aid kits will come in handy.

At one of the levels, the elevator will get stuck, and you will need to run to the rusty switch on the wall. By pulling it, you will restart the lifting mechanism, after which you can continue completing the Fallout 4 “Mass Fusion” quest and go to the basement.

Mission finale

Below you will find a room with a wide panoramic window overlooking the center of the nuclear reactor. Go through the door on the left. The next room will have a huge level of radiation, and if you haven’t stocked up on the necessary armor, then a suit that can be found in the box behind the door along with anti-radiation drugs will help protect you a little. We go into the dressing room, click on the desired button, and activate the cleaning. Now the life of the main character depends on the speed of our actions, because from now on you will begin to receive a huge dose of radiation every second. We quickly move to the stairs on the right, go up and, by pressing the lever, remove the reactor core. After which we run out of the room as quickly as possible and close the doors using the button.

Don't think that this is where all the adventures are over. Ahead of us is a battle with a robot armed with a Gatling laser and a protectron. In order not to fight with them at the same time, it is better not to leave the dressing room just yet, because a large robot will not be able to enter here, and the Protectron is not that strong. After defeating them, get ready for two stormtrons to appear. It is quite difficult to fight them, so you should not go on the attack. It is better to maneuver and run away, shooting back, while watching the charging of the lasers on their heads. After defeating this vehicle, you will encounter a couple more turrets, but they are not that strong.

We go to the elevator and begin our ascent: on the first floor the hero will witness the battle between the Brotherhood of Steel and the Institute. And here there are two options for further action: we can stay to help our allies, which is not necessary, or go upstairs. Returning to the Institute, we talk with Ellie, to whom we hand over our task “Mass Fusion” (Fallout 4). This quest is completed, but many more adventures await us in the wasteland.

Captain Kells will inform you that Proctor Ingram is completing the assembly of Liberty Prime and needs your help. Find her aboard the Prydwen and talk to her.

Liberty Prime needs to be powered on its own, for this you need to find a beryllium impeller. You go to Mass Fusion, a former energy company. You can take Proctor Ingram with you or not. Once you accept this mission, you will have to make a very important decision. You can:

Option 1: Inform the Institute

Leave Prydwen, travel to the Institute and warn them, thus you will defect to the Institute, betraying the Brotherhood of Steel. Immediately after this, the quest from the Mass Fusion Institute will begin.

Option 2: Fly to Mass Fusion

If you decide to remain loyal to the Brotherhood of Steel, then go to the flight deck and board a rotorcraft that will take you to the roof of the Mass Fusion building. You are now an enemy of the Institute. The started Institute quests will be failed, and the Institute quest “Exile” will begin.

Do you have enough supplies and supplies? Otherwise, your loved ones may be concerned by the fact that you did not think to take with you a sufficient amount of healthy food and medicines that suppress radiation. Since the internal environment of the Mass Fusion building can be extremely dangerous, why not wear appropriate protective clothing? Power armor would be an excellent choice for such an occasion.

As you approach the Mass Fusion building, you will see an enemy - synths, who will immediately begin to fire at you. Luckily, you have a minigun with unlimited ammo in your hands. How accurate you are will determine how many enemies you have left to finish off after you jump onto the roof, so aim better.

Jump to the roof of the Mass Fusion

The Brotherhood rotorcraft has received serious damage, you will have to jump out of it while moving. Press to jump out of it onto the roof of the Mass Fusion. Neutralize all the enemies on the roof before going in search of the Beryllium Impeller.

Find a beryllium impeller

"Mass Fusion" is a huge building, where can I find this impeller? Climb the stairs to the second level of the rooftop structure and go to the other end of the corridor. In the far room you will find the terminal of the main research laboratory (medium level).

You can hack it or take from the executive's desk that you just passed in the corridor (see screenshot below), the password of the "Mass Fusion" executive and gain access to the terminal. From the first letter you will learn that a beryllium impeller has been installed in the reactor , located in the basement of the building.

Get a manager's ID

From the personal letter in the terminal you will also learn that in order to penetrate the reactor level you need an employee's administrative card. You can use the manager’s ID, which is in his desk, in the same place as his password (see screenshot above). You will also need this ID in order to start the elevator and get from the roof into the Mass Fusion building.

On the top level of the building on the roof you will find a storage room (castle level - medium) with medicines and a first aid kit on the roof.

Infiltrate the reactor level

Use the ID you found and activate the elevator. During the descent, synths will start shooting at you, and there is nowhere to hide. I hope you took the advice above and prepared by purchasing strong armor, and a more powerful weapon would not be amiss. It also doesn't hurt to restore your health more often.

The synths managed to cut off the power to the elevator, so you are stuck somewhere in the middle of the building. Deal with the enemies, and when the path is clear, you can:

• going down further on foot is an option for those who like to explore everything;
• restoring the power supply to the elevator is an option for those who are results-oriented and completing the mission as quickly as possible.

Restore power supply to the elevator (optional)

By restoring the elevator, you will be able to immediately access the lobby on the first floor of the Mass Fusion building, from where it is a stone's throw to the basement. There are two ways to restore the elevator: hack the terminal of the product development director or turn on the switch.

The first method is for hacking enthusiasts. In order to restore power to the elevator, it is necessary to hack the terminal of the director of product development (level - difficult) in the office, which is located in the hall with a glass floor to the left of the elevator.

In order to turn on the switch, you must go up the stairs in the room to the right of the elevator. By the way, in this room you can find ammunition in the toolbox lying next to the terminal. Having risen, go along the entire floor to the last room, in which you will find a switch next to the entrance. In the same room, only at the other end, you will find a safe (lock level is difficult) with ammunition.

The elevator's power has been restored; take it all the way down to the lobby, so you'll miss most of the encounters with the synths.

Clue

If you decide to move on without restoring power to the elevator, then you need to jump through the gap in the floor to the level below. It is located behind a locked door (the lock level is difficult) in the glass-floored hallway. You can hack it yourself or open it with the key that lies on the desk in the adjacent room, next to the terminal of the director of product development.

Be prepared for a skirmish with the enemy, who will have to be destroyed before moving on. You find yourself on an almost destroyed floor, but despite this, you can profit from something here too. Climb the makeshift ramp in the corner to a small piece of the floor of the next floor, there you will find a toolbox with ammunition and weapons. And on the other side of the destroyed part of the floor there is a yellow box with explosives.

You will jump down another floor, to a level with two exits to the balcony. In the corner room you will find a safe in the wall and a nuclear mini-charge for “Fat Man” on the bedside table, in the hall in the Yader-Cola machine near the corner sofa - Quantum Yader-Cola. You can then take the elevator located in the corner and go down to the lobby, or take the descent another floor below and continue exploring the Mass Fusion building. The descent is to the right of the elevator.

Clue

But don’t leave here without a valuable trophy that only a real explorer can find— baby doll "Strength". It is located on top of the main statue of the building and you can see it if you stand in front of the main elevator, lean over the railing and look down. With this doll, your “Strength” parameter will increase by 1 point.

Let's see what else the Mass Fusion building hides; we won't go down the descent, we won't take the elevator, but we'll jump into the gap in the floor at the opposite wall from the elevator and the descent. In it you will see a safe (lock level - medium) with various useful items. Then go out into the corridor and jump down the ramp. After going down, turn left into a room with a lot of terminals and equipment, where you will find a hole in the floor, where in the destroyed toilet you will find a first aid kit and a bag with ammunition and weapons.

Then go through the adjacent rooms to the office, here among the corpses of the shooters you will find a suitcase (lock level - light) with armor and a green bag with ammunition. Then follow to the archive (a room with many filing cabinets), where you will find a descent to the floor below. Cross the nearly destroyed bridge over the first floor lobby. Before going further down the stairs, collect the ammo from the dead shooter (green box).

Another staircase and we are in the lobby of the first floor of the Mass Fusion building. Strong enemy resistance awaits you here. Having dealt with the enemy, go around the premises of the first floor. In the room to the right of the small elevator you will find a locked storage room (lock level - light) with medicines inside, in the next office there is a wall safe (lock level - medium) and a bag near file cabinets with ammunition and weapons. Now you can go to the opposite wing, where the entrance to the reactor level and the security office are. By the way, you can hack the security service terminal (level - easy) and activate two protectrons to protect order and turrets. They can help in the fight against synths when you come out with a beryllium impeller.

Now go to the elevator with the card reader, it will take you to the reactor level, where the item you came here for is located.

Enter the reactor compartment

Getting to the reactor level is half the battle; now you need to remove the beryllium impeller from the reactor. If you go to the left of the elevator you will get to a prototype laboratory, using the terminal (level - easy) which you can activate the protectron, and if you go to the right, you will go down the stairs and you will find yourself in the passage for reactor level maintenance personnel. Using the service personnel terminal (medium level), you can also activate the assault gun and turrets, and, most importantly, open the door to the main reactor.

It won’t hurt to look into the locker room, where there is a bag with ammunition and weapons, and in the toilet there is a first aid kit with drugs that may be useful to you in the fight against radiation.

The main reactor hall has two levels. On the upper level on the left you will find a chest with a wide selection of ammunition and weapons, as well as a control terminal for the reactor safety system (the level is very difficult). Read about it below.

On the lower level on the left, next to the entrance to the reactor itself, is the analyst's office. Here you will hit a big jackpot: you will find a protective suit, medicine, Yader-Cola, and a safe (the castle level is very difficult) with ammunition and weapons. And also a terminal (level - easy), using which you can open the safe and activate the protectron.

You can go to the reactor compartment for the impeller, but make sure that you take care of protection from radiation, since its level is lethal. If not, then find yourself a protective kit that completely protects against radiation. They are everywhere here: in the locker room of the service personnel, in the analyst’s office and in the drawers of the control point terminals. The disadvantage of the protective kit is that it does not protect against other types of damage. In this case, power armor is simply irreplaceable.

To get into the reactor compartment, you need to go through a special corridor located on the left side and press the red button, which will open the door.

Unlock the reactor

The beryllium impeller is at the top of the reactor, go up there and press the red button to unlock the reactor. Don't forget to keep an eye on your Geiger counter, or you'll die before you know it.

Pick up the beryllium impeller

Take the beryllium impeller that brought you such a long way. But don’t be too happy, as soon as you have it in your hands, the security system will turn on and the turrets will start firing at you.

Eliminate security at the reactor

But the turrets in the reactor compartment are nothing compared to what awaits you when you return to the main reactor control room. There you will be attacked by a Security Robot, shooting at you with a machine gun, and a Protectron, and will also fire at the turret. As soon as you deal with them, the main doors will open, and there will also be two assault guns at your service, which you will also have to deal with.

• The most important thing in fighting an assault gun is to not let it shoot an energy beam from your head, as it will kill you almost immediately, or to try to dodge it.
• Don't paint yourself into a corner, as the Assaultron will constantly attack you. Move and try to keep him at a distance so that you have room to maneuver. This also applies to other enemies.
• Choose a more powerful weapon.
• And find yourself some power armor, you are from the Brotherhood after all)

But the assault trons are not the last level of reactor security; there remains one more protectron and a laser turret at the exit. Ask if there is any way to bypass them? Can.

In the main reactor control room there is a reactor safety system control terminal (level - very difficult) which is located on the second level to your left as soon as you enter the main reactor. If you can hack it, you will open the door to the supply department office on the opposite side of the room. Inside is a supply department terminal that allows you to completely disable the reactor's safety system. This way you can prevent robots and turrets from attacking you when you remove the beryllium impeller from the reactor.

Can't hack a terminal with a very difficult level? You can also hack other terminals scattered throughout the reactor level, activate all the Protectrons and Stormtrons and destroy them in advance. These are all the terminals described above after getting to the reactor level: the prototype laboratory terminal (Protectron), the service personnel terminal (two assault guns and a turret), the analyst terminal (Protectron). You only have to fight the Security Robot.

Leave Mass Fusion

Return to the lobby of the Mass Fusion building, where a battle has broken out between the Brotherhood of Steel and the synths sent by the Institute. Leave the location, the closest escape route is the two main exits on the first floor.

Help the Brotherhood fighters in the lobby (optional)

If you have enough ammunition and desire, provide fire support to the Brotherhood of Steel fighters to recapture Mass Fusion from the enemy once and for all. This will say a lot about your dedication to the Brotherhood of Steel. By the way, this is where the protectrons and turrets, which were written about earlier and which you can activate in the office opposite the elevator leading to the main reactor, will help you.