- Fallout New Vegas vaults were designed by Vault-Tec as elaborate social and biological experiments rather than just protective shelters.
- Vault 11 features the most disturbing social experiment, requiring annual human sacrifices based on democratic voting.
- Vault 22 is a botanical nightmare where a fungus reanimates human hosts into Spore Carriers.
- Vault 34 serves as the origin point for the Boomers, containing a massive, radiation-soaked armory.
- Vault 21 is unique for being integrated into the New Vegas Strip and used as a gambling-themed hotel.
Vault 3: The Fallen Control Center
Vault 3 was originally designed as a "control vault," intended to function exactly as advertised: a safe haven to sustain human life for 20 years before reopening to rebuild society. Unlike most other Fallout New Vegas vaults, it lacked a sadistic social experiment. However, its fate proved that even a successful vault is not immune to the harsh realities of the Mojave Wasteland. After a water leak flooded the lower levels in the 2200s, the residents opened the doors to trade, only to be massacred by the Fiends, a violent gang of chem-addicts.
Video Highlights:
- Detailed overview of the lore behind the Mojave's most famous vaults.
- Breakdown of the tragic fall of Vault 3 to the Fiend gang.
- Exploration of the horrifying "sacrifice" experiment in Vault 11.
- Analysis of the botanical infection that wiped out Vault 22.
Vault 3 is currently the primary base for the Fiends. When entering, expect heavy resistance from Motor Runner and his gang. If you are working for the NCR, ensure you have the bounties for Cook-Cook, Violet, and Driver Nephi active before clearing the area.
| Location | Primary Residents | Status | Main Threat |
|---|---|---|---|
| Vault 3 | Fiends (Raiders) | Occupied | Motor Runner / Fiends |
| Entrance | South Vegas Ruins | Flooded/Damaged | High Radiation (Lower) |
| Key Loot | Maintenance Key | Essential | Motor Runner's Chainsaw |
Fallout New Vegas Vaults: Social Experimentation in Vault 11 and 19
The social experiments conducted by Vault-Tec are nowhere more evident than in Vault 11 and Vault 19. These locations were designed to test human behavior under extreme psychological stress, often leading to total societal collapse within the vault walls.
Vault 11: The Ultimate Sacrifice Located in the central mountain region, Vault 11 forced its residents to sacrifice one member of their population every year. If they refused, the vault computer threatened to kill everyone. This led to the formation of corrupt political factions known as "Voting Blocks" that manipulated elections to save their own members.
Justice Block
The most powerful and corrupt block, led by Roy Gottlieb. They used blackmail and coercion to control the sacrifice nominations.
United Vault Technicians
A coalition of technical workers who often traded maintenance services for voting protection.
Divine Will Block
A religiously motivated group that viewed the sacrifice as a necessary spiritual burden for the vault's survival.
Vault 19: Induced Paranoia Vault 19 was divided into Red and Blue sectors. Vault-Tec used non-lethal chemicals and auditory stimuli to induce paranoia between the two groups, leading them to believe the other side was sabotaging their air supply and lights.
| Experiment Type | Vault 11 (Sacrifice) | Vault 19 (Paranoia) |
|---|---|---|
| Objective | Test selflessness vs. survival | Test group segregation/mistrust |
| Outcome | Mass civil war / 5 survivors | Abandoned / Sulfur leak |
| Current State | Ruined / Filled with Vermin | Occupied by Powder Gangers |
The ultimate tragedy of Vault 11 is that the "refusal to sacrifice" was the actual goal. When the last five survivors finally refused to kill another person, the computer congratulated them and opened the doors, revealing that no one would have ever been killed if they had simply said "no" from the start.
Vault 22 and 21: Botanical Nightmares and Vegas Gambling
These two vaults represent the diversity of Vault-Tec's research, ranging from agricultural science to behavioral modification through gambling.
Vault 22: The Green Hell Vault 22 was a research facility focused on solving world hunger through advanced crop experimentation. However, a fungal donation from the Big MT facility, known as Beauveria mordicana, turned the residents into Spore Carriers—reanimated corpses controlled by the fungus.
Enter the Overgrowth
Navigate the first level and repair the elevator using a Repair skill of 50+ to access lower levels quickly.
Find Keely
Locate the ghoul scientist Keely in the lower levels. She will task you with deleting research data to prevent the fungus from spreading.
Ignite the Gas
Use a long-range explosive or energy weapon to ignite the gas leak in the vents, purging the spores from the vault.
Vault 21: The Gamble Located directly on the New Vegas Strip, Vault 21 resolved all internal conflicts through gambling. It is one of the few successful Fallout New Vegas vaults that did not end in total disaster, largely because Mr. House intervened, won the vault in a game of Blackjack, and converted the upper levels into a hotel while filling the lower levels with concrete.
| Vault 22 Hazards | Description | Mitigation Strategy |
|---|---|---|
| Spore Carriers | Hidden plant-human hybrids | Use VATS to spot them in bushes |
| Spore Runt | Small, fast fungal creatures | Melee or shotgun at close range |
| Gas Leaks | Flammable pockets of air | Avoid fire until quest completion |
Vault 22 contains the unique AER14 prototype laser rifle. It is located on the fifth level (Pest Control) in a locked room near the common area. It deals significant fire damage, making it excellent against the Spore Carriers themselves.
Vault 34: The Birthplace of the Boomers
Vault 34 is perhaps the most dangerous location for unprepared explorers due to extreme radiation levels. Its experiment involved overstocking the armory with high-grade weapons and providing no locks, leading to inevitable internal strife and overpopulation.
The Boomer Migration The "Boomers" of Nellis Air Force Base are the descendants of the Vault 34 residents who fought their way out of the vault after the Overseer attempted to restrict access to the weapons. Those who stayed behind eventually succumbed to radiation and turned into Glowing Ones and security ghouls.
| Notable Loot | Location | Requirements |
|---|---|---|
| All-American | Armory (Lower Level) | Armory Key / High Rad Resistance |
| Pulse Gun | Armory Locker | Col. Blackwell's Key (from REPCONN) |
| Vault 34 Security Armor | Security Station | None (Loot from bodies) |
The radiation in Vault 34 is severe (up to +10 rads/sec in some areas). You must bring at least 10-15 Rad-X and RadAway, or wear a specialized Radiation Suit/Power Armor before attempting to reach the reactor or the armory.
Mojave Vault Comparison and Completion Checklist
Navigating the Fallout New Vegas vaults requires a mix of combat prowess, high skills (Lockpick, Science, Repair), and a strong stomach for the disturbing lore found in terminal entries.
| Vault | Skill Requirements | Key Item / Reward | Primary Quest |
|---|---|---|---|
| Vault 3 | Lockpick 75+ (Optional) | Motor Runner's Helmet | Three-Card Bounty |
| Vault 11 | Science 75 (Terminal) | Survivor's Recording | Still in the Dark |
| Vault 19 | Explosives 60+ | Red/Blue Keycards | Why Can't We Be Friends? |
| Vault 21 | Speech 50 (Sarah) | Vault 21 Jumpsuit | None (Exploration) |
| Vault 22 | Repair 50+ / Science 65 | AER14 Prototype | There Stands the Grass |
| Vault 34 | Lockpick 100 (Optional) | All-American Carbine | Hard Luck Blues |
Vault Hunter Checklist:
- Recover the AER14 Prototype from Vault 22
- Discover the fate of the Vault 11 survivors in the sacrificial chamber
- Obtain the All-American marksman carbine from Vault 34
- Decide the fate of the Vault 19 Powder Gangers
- Retrieve the water chip data (or equivalent) for the NCR quests
- Visit Doc Mitchell's original home (Vault 21) on the Strip
When exploring any vault in the Mojave, always read the terminals. The environmental storytelling in Fallout: New Vegas is peak RPG design, and the logs in Vault 11 and Vault 22 provide essential context that makes the combat encounters far more meaningful.
FAQ
Q: Which Fallout New Vegas vaults are the most dangerous?
Vault 34 is widely considered the most dangerous due to its lethal radiation levels and high concentration of Glowing Ones. Vault 22 is also hazardous because of the Spore Carriers' ability to ambush players from the foliage.
Q: Can I still enter Vault 21 if it's filled with concrete?
Yes, you can visit the upper levels which Sarah Weintraub has converted into a gift shop and hotel. However, the lower levels are inaccessible unless you are following specific quest lines related to Benny and Mr. House's secret tunnels.
Q: Is there a 'Control Vault' in the Mojave that didn't fail?
Vault 3 was the only control vault in the Mojave. While it functioned perfectly for decades, it ultimately failed due to external factors (the Fiend invasion) rather than internal experiments.
Q: How do I reach the armory in Vault 34?
You must first find the Overseer's keycard on his desk (which requires defeating the ghoulified Overseer), then use the submerged terminals to drain the water in the lower levels. This eventually unlocks the security door to the main armory.