Subnautica, a game developed by UnknownWorlds, is a singleplayer game, that is focused on survival and exploration of an unknown planet, that is mostly water. You need to find the resources to survive, and escape the planet, without knowing what to expect, nor what you are going to find.
Published by Unknown Worlds Entertainment, Subnautica was first released in December 2014 for Microsoft Windows in early access, June 2015 for Mac and May 2016 for Xbox. It got full released in January 2018 for Steam only, and later got added to the Epic Games store and Discord, with the versions for Xbox and Playstation 4 in December 4th.
With 4 whole years of development, the game got some huge changes, from graphics to the gameplay itself.
Subnautica’s site: https://unknownworlds.com/subnautica/
Its Game Time 