Subnautica is an open-world action-adventure game developed and published by Unknown Worlds Entertainment. The game has the player as a non-essential systems maintenance chief who is the only survivor of a spaceship crash on the alien planet 4546B. They are free to explore the oceanic planet, the main objectives being to find essential resources, survive the local flora and fauna, and find a way to escape the planet.Subnautica was released in early access for Microsoft Windows in December 2014, macOS in June 2015, and for Xbox One in May 2016. It was released out of early access in January 2018 for Microsoft Windows and macOS, with versions for Xbox One and PlayStation 4 in December 2018. The physical console versions were published by Gearbox Publishing. The Nintendo Switch, PlayStation 5, and Xbox Series X/S versions were released in May 2021.