https://wccftech.com/fallout-new-california-is-out-new-vegas/

Fallout: New California launched earlier this week as previously announced by the dedicated group of modders who’ve worked on this side project for Fallout: New Vegas. You can now download it from ModDB.

This should be nice especially for those who are eager for more strictly single player Fallout 4 content, given that the upcoming Fallout 76 is multiplayer only for now (albeit playable solo).