The death of the Master was the first major step towards ending his mad dream of conquest and enforced peace, but it is the destruction of the Vats that neutralizes the mutant threat. Without the ability to create more mutants and enforce their harsh brand of justice, the mutant armies flee to the east, beyond the no-man's land.Template:Inline quote
Prerequisites: Destroy the Military Base before taking the Cathedral.
You managed to destroy the Vats, then you killed the Master before he could realize his twisted plans. With the Master gone, his armies flee to the east in fear of retribution from the remaining normals.Template:Inline quote
The ghouls of Necropolis learn how to maintain the repaired water pump, and eventually rediscover many lost secrets of engineering. They form a business selling this technology to other towns.Template:Inline quote
This ending is partially canon, as mentioned by some ghouls like Lenny in Gecko.
Prerequisites: Tandi is dead or not rescued, Aradesh is alive.
Aradesh grieves for his slain daughter, Tandi, but eventually builds Shady Sands into a respected community which is prosperous for many years, before his untimely death at the hands of a Desert Raider.Template:Inline quote
Prerequisites: Both Aradesh and Tandi are dead (or the latter not saved from the Khans).
With Aradesh dead, and Tandi missing or killed, Shady Sands needs a new leader. After several elections, they find they cannot be governed by a single person and create a guiding council. Shortly afterwards, the Raiders regroup and attack Shady Sands, burning the small community to the ground.Template:Inline quote
In the original write-up of Junktown, the "ending sequence" was reversed from its final incarnation. See the alternate endings for the original versions, which were changed because the marketing department decided at the last minute that the game had to "reward good and punish bad".
Junktown becomes the new boomtown under the careful, and profitable, guidance of Don Gizmo. He profits the most, and continues to increase the size of his casino, and the scope of his power, until he chokes to death while eating some iguana-on-a-stick.Template:Inline quote
Under Gizmo's leadership, Junktown becomes a trading center and resort, where people come from miles around to gamble, spend money and enjoy themselves in relative safety. Gizmo keeps the town prosperous but healthy, as he has no desire to injure his own affluence. The inhabitants of the town become wealthy and famous.
[With the background picture showing Junktown as a Reno-like casino with electricity and clean streets free of any drug dealers or riff-raff who might endanger Gizmo's operations.]
The Brotherhood of Steel helps the other human outposts drive the mutant armies away with minimal loss of life, on both sides of the conflict. The advanced technology of the Brotherhood is slowly reintroduced into New California, with little disruption or chaos. The Brotherhood wisely remains out of the power structure, and becomes a major research and development house.Template:Inline quote
The Brotherhood of Steel, under new leadership after the death of Rhombus, becomes an overzealous, techno-religious dictatorship. In 20 years, the Steel Plague devastates the newly formed New California Republic, and starts a Dark Age that could last a thousand years.Template:Inline quote
Prerequisites: Kedrick is alive, or the Master is alive for 170 days.
The Brotherhood of Steel repels the first wave of a mutant invasion, but a traitor in their midst causes the Citadel to fall. Fortunately, the advanced technology is mastered slowly by the mutants, and they were unable to use it against you.Template:Inline quote
With your assistance, Old Harold brings the ghoul population of the Hub into equality with the humans. The two sides work together, and the Hub prospers. Old Harold is still alive, as far as anyone knows.Template:Inline quote
Prerequisites: Take the Bloody Mess trait when creating your character (or picking up the Mutate! perk), procure bad Karma by the end of the game, or very quickly initiate combat upon exiting the conversation with Jacoren.
You march into the desert sands, leaving the shattered corpse of the Overseer behind you, never to return to the Vault.Template:Inline quote