... So there I was, just narrowly escaped disaster, crash-landed(?) on an alien world.
In every direction, as far as I could see, ocean. Except for to the west, that was where the smoking hulk of the starship came to rest.
And here I am, completely alone. Above: nothing. Below: darkness and monsters from my nightmares...
I just finished Subnautica, and I would say it's easily the best exploration game I've ever played.