Bethesda Plays Fallout 4 - Vault-Tec Workshop (Developer Walkthrough)

This is a DLC add-on for Fallout 4, released in 2016, that enhances the settlement building mechanics. It requires the base game and unlocks after reaching level 20 outside the Institute. The core loop involves building and managing your own functional Vault-Tec Vault using specialized pre-war kits, furniture, and décor. A distinctive feature is the ability to assume the role of an Overseer and run approved psychological experiments on your Vault Dwellers to observe outcomes, adding a simulation layer to existing settlement gameplay.