This won't be the best 'good ending' to suit your tastes. If your idea of a 'good ending' is everyone dead and a giant pile of pillows that you stole from all corners of the Commonwealth placed in one room guarded by nukemines and missile turrets, then.yeah. Side quests for all three factions are open to you along with various post-event quests. You are a high-ranking knight in the Brotherhood, a major asset of the Railroad, and (of course) the leader of the Minutemen.
You cannot get to blind betrayal and have friendly behavior from all BOS to all your companions. Other ending have the BOS Hostile to railroad or the MM, or both. Now let me be very clear, With this ending ALL above ground factions WILL BE AT PEACE and will have the player hero marked as a hero. This ending keeps all the major factions alive and happy with you. But, since karma doesn't exist in Fallout 4, this ending is best described as putting the Commonwealth into a state of strong stability for all of the major players (except for the Institute.those slaving, murdering bastards get nuked). Previously, this might have been called a 'good karma' ending.
Warning! (Spoilers) !! This covers the end game without giving away to much, just quest names and general info.Ī 'good ending' is in the eye of the beholder, of course.