He will tell you thatSturgeshad found a way to get into the Institute without having to use the teleport.
Go toSanctuarywhere Sturges should currently reside and talk to him.
initiate the world map and first move toC.I.T.
Ruinsunderneath which the Institute is located.
Ignore the building on the surface and set this quest as active.
This will lead you to the pipe at the river.
The location of the pipe is shown on the above pictures.
Dive in and swim through the first tunnel that will lead you to a separate location.
Important- From now until you reach the Institute you will have to deal with radiation.
It will be small, so you don’t have to use power armor or hazmat suit.
Leave the water after you reach the underground location and walk towards the keyboard in one of the walls.
Interact with it and enter the code you received from Sturges.
Continue the pretty linear journey through the sewers.
In addition to the radiation, you will face few other obstacles.
It is worth mentioning that during the trip you could find terminals.
Hacking into them will allow you to deactivate some nearby turrets.
You must reach a new pipe.
Walking through the partially flooded pipe will allow you to reach theInstitute.
Remain in the room in which you found yourself after walking through the sewers.
Interact with the computer terminal you find here.
Press the load holotape key/button and choose the Institute Relay Targeting Sequence from the list.
This will activate the transmitter and allow a group of Minutemen to reach this place.
Talk toPreston Garveybefore you go ahead - he will give youFusion Pulse Charge.
Now you will have a long journey ahead of you through Institute’s rooms.
Keep walking ahead until you reach the hatch in the ground.
You must open it and jump inside.
Be ready for new battles.
Once the battle is over, listen to the information fromSturgesabout some unpredicted complications.
Remain in the room where the last battle took place.
In its central part there is a large elevator which you must enter.
Use another elevator slightly further and it will lead you to the previously visitedFather’squarter.
If you want to, you could speak with the dying Father lying on the bed.
At this point the game will allow you to use unique dialogue options related to highCharisma.
No matter how you behaved towards the Father, walk to the computer terminal pointed by the game.
Now do three things:
you could move on.
If you given the command of deactivating the synths, some of them will be inactive now.
Use the passage to the Institute Advanced Systems section and then to Institute Reactor.
Soon you will reach the room with the reactor.
During this fight, two elite synths should join the regular ones.
Once you win the battle, consider putting the Hazmat suit on or taking Rad-X.
Leave the small room after you complete that action.
Talk toPreston Garveyand wait until you are teleported to a new room.
There you will find the previously met syntheticShaun.
Finally, talk toSturges.
Now you’re able to position yourself on the platform and wait to be “transported”.
The target of the teleportation isMass Fusionbuilding.
There is only one action to be done there - press and hold the detonator button.
This will blow up the Institute headquarters.
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