Fallout 4's Vault-Tec Workshop DLC comes out on 26th July, Bethesda has announced.
Vault-Tec Workshop is the fifth add-on for Fallout 4 and the third workshop add-on. It lets you create a massive Vault and attract new dwellers. As an Overseer, you can run Vault-Tec-style experiments on your dwellers.
The Vault-Tec Workshop DLC precedes Fallout 4's final DLC: the Nuka World expansion. That's due out in August.