The Metro is a mod for Fallout 4 that adds a village and a network of underground tunnels. This village is located within the city of Back Bay. The village has a population of NPCs that are not yet able to access their supplies and are forced to scavenge for food and items. The player is tasked with going down into the deep, dark depths of D6 in an attempt to make the scavenging areas safe again.

In this mod, the entrance to the underground tunnel network is situated within the Back Bay area. The player will find that the inhabitants are unable to access their supplies due to the appearance of some stronger mutants within the tunnels.