Every ‘Fallout’ Vault in New Vegas, Explained

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Prime Video’s popular series Fallout, based on the video game franchise, is gearing up for its second season, set to premiere on December 17, 2025. This season will take the story to New Vegas, a major location from the game Fallout: New Vegas. For fans of the games, Fallout: New Vegas is the fourth main installment and a spin-off set over two centuries after a nuclear apocalypse.

I’m so hyped for Season 2 of the show! It sounds like they’re really taking inspiration from Fallout: New Vegas, which is awesome. From what I’ve heard, Lucy and The Ghoul are heading to New Vegas, and it’s going to be a wild ride. Apparently, this new guy, Mr. House, is running the place and isn’t messing around. What’s even more exciting is they’re saying Lucy and The Ghoul will stumble across at least six new Vaults along the way, and each one has some seriously messed-up experiments going on. Thinking about the Vaults from the original New Vegas and how twisted things got inside them is making me even more eager to see what’s coming!

‘Fallout’s Season 2 Plot, Explained


Prime Video

The second season of Fallout draws inspiration from the 2010 role-playing game Fallout: New Vegas. Set in 2281 – 204 years after a devastating nuclear war between the U.S. and China – the season follows Lucy and Cooper on a long journey across the dangerous Mojave Wasteland towards New Vegas. The city is controlled by Mr. House, who leads as the CEO of RobCo Industries and owns the entire New Vegas Strip. His ultimate goal is to rebuild society in a way that allows him to rule absolutely.

Following the events of Season 1, Lucy and Cooper will travel to New Vegas to find Lucy’s father, Hank McLean (Kyle MacLachlan), and hold him accountable for his involvement in the war. Season 2 will also introduce new characters played by Macaulay Culkin, who will portray a brilliant but eccentric individual, and Kumail Nanjiani as a skilled air pilot. The search for Lucy’s brother, Norm (Moses Arias), will continue to be a major focus, with family relationships playing a central role in the story. Throughout their journey, Lucy and Cooper will discover up to six new vaults inspired by the Fallout: New Vegas video game.

Vault 3


Bethesda Softworks

Vault 3, situated in the South New Vegas region, was designed by the Vault-Tec Corporation as a safe haven for ordinary people, alongside Vaults 11, 19, 21, and 34. Unlike many other Vaults, it wasn’t intended for a specific social experiment. For centuries after the nuclear war between the U.S. and China, Vault 3 thrived peacefully. However, in the 23rd century, a water leak forced the Vault to open, and this attracted the dangerous Fiends – a violent gang known for drug use and raiding.

The Fiends forced their way into Vault 3 and killed everyone inside, taking it over as their base. Over time, they’ve become a serious danger to people in New Vegas, especially those near the Strip, and also to the NCR soldiers stationed at Camp McCarran.

Vault 11


Bethesda Softworks

Vault 11, situated west of Boulder City in the Mojave Wasteland, was built as a home for ordinary people. But unlike some other vaults, it was part of a twisted experiment: each year, the residents were forced to choose someone to sacrifice, supposedly to ensure the survival of everyone else. In reality, this was a psychological test designed to see how far the Vault 11 dwellers would go and what their moral limits were. If the experiment ‘failed,’ everyone would be killed, but this was just part of the test.

A leader, called the Overseer, is chosen by vote, but their term ends with execution. If someone in Vault 11 doesn’t participate in the experiment, they aren’t punished with death. Instead, they receive a message praising their respect for life. Even better, those who complete the experiment are told the vault will open, and they’ll be free to leave – if the Overseer allows it.

Vault 19


Bethesda Softworks

Vault 19 is conducting a controversial social experiment where residents are deliberately divided into two groups – Red and Blue. Each group is overseen by a different leader, and the goal is to create fear and suspicion between them, driving a wedge between the two factions. This is achieved through subtle, non-harmful methods like hidden messages, coded language, unsettling sounds and lights, and mysterious voices, all designed to increase mistrust.

With the U.S. deeply divided politically, Prime Video’s popular show Fallout has a chance to deliver a powerful message with the story of Vault 19. As seen in Fallout: New Vegas, the experiment within Vault 19 goes wrong when a nearby sulfur mine starts leaking. The resulting exposure to sulfur causes severe headaches, making the residents increasingly confused, frightened, and suspicious of each other, ultimately leading them to blame their neighbors for the problem.

Vault 21


Bethesda Softworks

Vault 21 in New Vegas is a unique social experiment built around gambling. The vault is designed to be perfectly equal for all its residents, with everyone having the same living space and access to resources. Instead of being controlled by an overseer, the residents of Vault 21 settle disputes and determine leadership through games of chance – winners represent their fellow dwellers.

After two centuries, the fate of Vault 21 was decided by a Blackjack game between its representatives. Those who bet on opening the vault won, and Mr. House offered to rebuild New Vegas for them. Once the vault opened, its residents gradually integrated into New Vegas society. Afterwards, Mr. House shut down the vault’s technology, sold its belongings, and filled the space with concrete.

Vault 22


Bethesda Softworks

Vault 22, also called The Green Vault, wasn’t designed as a home for regular people. Instead, it housed scientists conducting an experiment to grow food and prevent starvation after the war. They aimed to return to farming, creating a food supply that could thrive without sunlight or normal water sources – essentially building a self-sufficient agricultural system.

The attempt to create a self-sufficient food supply for a city within Vault 22 tragically failed. A dangerous fungus used as pesticide contaminated the crops, killing some residents and horribly transforming others into plant-like zombie creatures known as Spore Carriers. What was meant to be a successful, isolated greenhouse experiment ended in disaster, leading to the Vault’s abandonment.

Vault 34


Bethesda Softworks

Vault 34 is a social experiment designed to explore the implications of the Second Amendment. It’s packed with people and weapons, and equipped with comfortable amenities like pools. The goal is to see if this overpopulated, heavily-armed community can maintain peace on its own, either by resolving conflicts through force or by keeping to themselves and enjoying the recreational facilities.

In a disastrous experiment within the new video game, Vault 34 fell apart due to extreme overcrowding. This led to widespread violence, many deaths, and total chaos, ultimately erupting into war. Armed groups battled for control, and one faction, the Boomers, eventually left for Nellis Air Force Base. Those remaining in Vault 34 suffered when the Vault’s power generator failed, exposing them to dangerous radiation and creating a population of mutated, feral creatures and glowing individuals. As the Vault collapses, the surrounding farmland is also becoming dangerously contaminated.

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2025-12-17 15:34