Unknown Worlds, developers of Natural Selection 2, have announced their latest title called Subnautica. Subnautica is said to be an open world underwater exploration and construction game that will combine elements of role playing, sandbox, exploration and cinematic games to create a unique experience. The game is still in an really early stage and Unknown Worlds have released a teaser video for it (no in-game footage though). Enjoy!
Subnautica Soundtrack: Ahead Slow