If you are too excited to wait for the Fallout 76 B.E.T.A. dropping this October, and you have a good gaming PC with a little extra money to burn, you might like to check out Outpost Zero for Steam Early Access which takes a lot of similar aspects while also providing brand new ideas to the open world, multiplayer survival game genre.
Source: N4G PC IndieSpotlight: Outpost Zero Hands-On Impressions