https://wccftech.com/pc-fallout-4-megaton-mod/

The PC Fallout 4 Megaton mod aims to recreate the sprawling settlement from Fallout 4 on Spectacle Island.

The mod from creator ‘DjxJt13’ is a work-in-progress but already looks promising and does a good job recapturing the Fallout 3 experience inside Fallout 4. We’ve included some screenshots from the mod in action below: