<Tr> <Th> Genre (s) </Th> <Td> Adventure, survival </Td> </Tr> <Tr> <Th> Mode (s) </Th> <Td> Single - player </Td> </Tr> <P> Subnautica is an open world survival adventure game developed and published by Unknown Worlds Entertainment . It allows the player to freely explore the ocean on an alien planet, known as planet 4546B, collecting unique resources to survive . Subnautica was first released in early access for Microsoft Windows in December 2014, Mac OS X in June 2015, and for Xbox One in May 2016 . The full release out of early access was in January 2018, exclusively for PC on Steam, with versions for the Xbox One and PlayStation 4 also planned for a Fall 2018 release date . Subnautica has a confirmed, yet unnamed standalone expansion, the planned early access and 1.0 release date most likely in 2019 . </P> <P> Subnautica is a survival, adventure game set in an open world environment and played from a first - person perspective . The player controls the lone survivor of a crashed space ship, called the Aurora, on the fictional ocean planet 4546B . The ship's wreckage explodes shortly after starting the game, from which point onward it can be explored . The main objective of the player is to explore the game's world and survive the dangers of the planet while at the same time following the story of the game . Subnautica allows the player to collect resources, construct tools, bases, and submersibles, and interact with the planet's wildlife . In the basic difficulty "Survival", the player will have to maintain nutrition, hydration, and oxygen . The game includes a day and night cycle which affects the gameplay and surroundings . The game includes three other modes: "Freedom mode", in which hunger and thirst are disabled; "Hardcore mode", which is the same as Survival, except that if the player dies, the player will no longer be able to respawn; and "Creative Mode", in which the hunger, thirst, health, and oxygen features are all disabled, all the crafting blueprints are acquired, where no resources are needed to craft and the submersibles do not need energy and cannot be damaged . The game is mainly set underwater, with two explorable islands . </P>

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