Find out the fate of the reconnaissance squad. 5000xp
You'll be given a location. A Brotherhood of Steel squad will be trapped in a cave, and next to the cave will be a group of Enclave fighters. You'll need to eliminate them. The Brotherhood squad will assist you at a certain point in the fight.
Bring the Holodisk to Professor Steele. 3000xp + Gauss Rifle
Deliver a certain artifact to the General in the Brotherhood of Steel bunker. A tough fight against numerous living creatures!
Note: Don't bring your car here before a major battle against mutants. This can cause a memory access error (presumably when attempting to place a mutant in the same location as the car).
Find out where the Enclave squad has gone. xp
Look for it at the old Military Base, you need to collect all 5 Holodisks.
? Bring data from Den ? xp
Fix the computer network. 1000xp
The computer consoles are located on the 4th level of the base, in the southeast corner. Eight of them are paired in one room, and two more are in the adjacent room. The activation sequence is as follows: first, activate the computers on the LEFT of each pair of eight in the room, then those on the RIGHT.
Important! Activate strictly in sequence, starting with the bottom left pair, moving across the screen to the right and up.
Next, go into the next room (the one with the large computer) and turn it on in the same way, first the LEFT one, then the RIGHT one. The procedure is simple: the scientist in the white coat standing in this room will give you the password. Then simply select "Turn On."
Return to Paul on the third level and tell him that you have done everything.
For those who have completed all the quests at the top and are still attacked by guards when going down: talk to the guy to the left of the bunker entrance and tell him that you saved their squad.
Source: falloutmods.fandom.com.