Vault 101
Just between you and me, sometimes we love to perform little experiements on the other vaults. Vault 101 is one of our older models. In this particular Vault we plan to... well, never open it. We'd love to see how the Overseer would perform if it just never opened.
Vault 111
In this vault we will experiment with cryogenics- that way some people don't have to wait for the reclamation - and they won't age a day, either! Of course it did come with some risks, and every dweller that participates in this Vault is incredibly brave.
Vault 76
Why, this vault is yours! Just look at all the decorations. We've going to have so much fun!