Subnautica features submarines. What happens when you drive a submarine into a rock, or a large alien life form gets a little too friendly? Watch this video to find out: httpv://www.youtube.com/watch?v=GukID8fcN_M 

Sylvain has been hard at work creating these effects. This is a technical prototype, and not representative of the quality of the final game. As the water level rises, there is less and less room to hide, and to breath. Perhaps if a submarine is not repaired fast enough, it will sink - And all the hard work that has gone into customising it, all the equipment stored on board, and even your life could be lost.