Subnautica is a great game, 9.5/10!
The game at first appears to be an underwater survival, but quickly becomes a horror as you descend into the depths. However, this is not all! The game has an amazing story to the game that I did not expect to find! The environments feel both alien, but also like something you can see on earth. The only reason I take half a point is because the game does have a few bugs that can be found.
At least that's my review of the game. Maybe I should write a steam review?