Vault 87
So, we're in Vault 87. Endless corridors and a sea of super mutants. My tactic for fighting the enemies was this: since the entire level consists of narrow turns and small rooms, immediately retreat as soon as you see an enemy unit and wait around the next corner. As soon as a mutant appears in your field of view, switch to VATS mode and aim for the head. This tactic is most effective because it's very difficult to concentrate and fight several mutants at once in large rooms and in the dark. Remember, grenades are still a thing.
We proceed straight down the corridor and enter a room with radroaches inside. Kill them, then turn right and climb the stairs. Super mutants will be waiting ahead, so keep your weapons at the ready. In the living quarters, we kill the master mutant and enter a large hall where more resistance awaits. We thoroughly search the room and collect the trophies; we'll need them later. To the right of the door we entered through is a passage leading to a long corridor with a super mutant at the end. After killing it, we enter the second door on the left and encounter two mutants. Try to separate them and kill them individually; fighting two enemies in narrow corridors isn't the best idea. After dealing with the threat, we return to the corridor and find a locked door. We hack it and take a book that increases melee combat. We leave the room and go up. Once we reach the top, we kill the super mutants and move on. We continue along the corridor, climb the stairs, and find ourselves in a section where experiments were conducted. The rooms with mutilated bodies and mutated creatures are clear evidence of this. We enter the room on the right, admire the dead monster, and loot some useful items. At the exit, we kill the centaur and move on.
After passing through the next door, we hear a calling voice. We approach the locked room and speak with the super mutant over the intercom. He swears he's different from the others and promises to help us retrieve the G.E.C.K. in exchange for his freedom. We question him and learn that the item we need is in a room with elevated radiation levels, and only Fox (that's the name of our new friend) can help us. To free him, we need to activate the fire console in the nearby room.
To the right of the room is a corridor leading to the desired location. We proceed to the end, enter the door on the right, kill the super mutants, and activate the console. Return to Fox. He's already waiting for us with a pipe in hand, ready to retrieve the G.E.C.K. A large number of mutants await us ahead, so we'll have a lot of work to do. It's not a good idea to leave all the work to Fox, as he's not immortal.
Having reached the high-radiation room, we stop and wait for our friend to retrieve the G.E.C.K. Upon returning, Fox will hand over the trophy and say goodbye. Now our task is to get the Generator into safe hands. But things aren't so simple. In one of the rooms, we are blinded and captured by Enclave soldiers, led by Colonel Autumn. The colonel will try to extract the code that will activate Project Purity in the Jefferson Memorial. Do not tell him the correct combination (2-1-6) under any circumstances; if we confess, we'll be killed immediately. After Autumn leaves, Henry Eden himself will speak to us and express a desire to meet in his office. This takes us to Raven Rock (the Enclave base) .
Source: SSoHPKC
See also:
Fallout 3: Paradise Falls
Fallout 3: Tempenny Tower
Russian location map f3