10 Fallout Vaults with Most Terrifying Experiments, Ranked by Sheer Horror

10. Vault 51: Let’s Put an AI in Charge

Vault-Tec didn’t assign an Overseer before sealing off Vault 51 — instead, they created an AI to do so. However, it had no clear instructions and started conducting competitions and experiments to find the worthiest candidate. Only one person survived them all and was “chosen” by the AI… And punished for his ineffectiveness.

9. Vault 108: Let’s Clone That Gary Guy

Vault 108 was created to fail from the start — but provided with a faulty cloning facility. In an attempt to fill the crucial staff positions, the Vault Dwellers cloned a guy called Gary a bunch of times. The clones were more aggressive each time until in the end, the Garys butchered their creators and took over the entire Vault.

8. Vault 95: Let’s Torture Some Addicts

Also known as “the Rehab Vault,” Vault 95 housed heavy addicts and cured them from their conditions. For years, they lived clean and peaceful lives, but then Vault-Tec’s hidden stash with drugs and alcohol was discovered. It didn’t take long until the addicts started killing each other for the poison they were just freed from.

7. Vault 77: Let’s Isolate That Guy Into Insanity

Vault-Tec, those curious folks, trapped a single man in a massive Vault built to house thousands of people. Instead of neighbors, they gave him a crate with puppets; one of them was programmed to whisper words of murder to him. Long story short, in a few years, the Puppet Man became the most feared maniac in the Wasteland.

6. Vault 92: Let’s Torture Sensitive Mucisians

Preserving art and beauty through the nuclear holocaust was the declared purpose of Vault 92. This facility housed the world’s greatest musicians — but only to torture them with white noise through Vault speakers 24/7. One by one, the poor performers started going progressively violent and insane, effectively exterminating each other.

5. Vault 11: Let’s Test People’s Compassion

We’re reaching the Top 5, and things are getting spicy. Vault 11 was all about human sacrifices — thrilling, isn’t it? Its inhabitants were told they had to regularly sacrifice someone to survive. After years of killing their own, the few remaining survivors learned they didn’t have to do all that. Struck with grief, they took their own lives.

4. Vault 87: Let’s Get Some Evolution Going

Vault 87 is the birthplace of Super Mutants and other FEV-injected creatures. The inhabitants of this Vault were blatantly injected with the Forced Evolutionary Virus in an attempt to create a new human species resistant to radiation; but when the subjects broke out, they decided to forcibly increase their population further.

3. Vault 12: Let’s Just Radiate All These Folks

Vault 12 was the biggest underground facility ever created by Vault-Tec, but its purpose was horrendous. This Vault wasn’t properly sealed off, and soon, the corporation learned exactly what radiation does to people: it turns them into ghouls. Those tortured souls later created their own city there, fittingly called Necropolis.

2. Vault 75: Let’s Create the Ultimate Human

Sacrifices, FEV, radiation… Next up, we have eugenics and forcible breeding. That’s right: in Vault 75, “faulty” people were simply executed, and children were groomed to become perfect adults. They were harvested for organic matters and forced to breed in an insane attempt to create the perfect human several generations later.

1. Vault 112: Let’s Trap People in a Nightmare

If you thought things couldn’t get darker, you were wrong. Vault 112 promised to put its inhabitants in a Virtual Reality where they’d live their lives as if the War never happened — and it somewhat delivered on its promise. But the man in charge of the experiment made the Vault Dwellers live through unspeakable horrors in their new reality, erasing their memories and torturing them time and time again for years.