HOST

You've crash landed on an alien planet with no recollection of your past.
You have no tools— only your hands.
You see an opening and your instincts tell you to go inside.
You twist and turn through chambers and passageways
You open and close puzzling openings only to get deeper and deeper.
You start to realize that the planet is alive.
It's consuming you.

There's no UI, no voice over, no buttons you have to press on your controller. You're on your own.