Subnautica: Below Zero is still in Early Access, but it's taken a big step toward the finish line with the release of the Relics of the Past update. The update delivers Below Zero's story "in its most complete form," with full voice acting, more alien mysteries, new world details, an updated look for the lead character, and a new Leviathan called the Void Chelicerate.
The new Subnautica starts off very much like its most excellent (and terrifying) predecessor, with a crash-landing on the mysterious world of 4546B.