Developer Unknown Worlds has announced that Subnautica 2 has passed 5 million copies sold, a milestone reached while the underwater survival game remains in early access. The figure underlines the strong commercial performance of the sequel to the popular Subnautica franchise, even before its full release.

The announcement coincides with the imminent arrival of Adaptive Measures, described as the game's first early access update. Beyond the sales milestone and the naming of the update, the source text supplied here consists largely of PC Gamer site navigation and membership-signup material rather than further detail, so specifics about what Adaptive Measures will add were not included in the provided content.