This is a short indie horror game I found on Steam for free. It was created by David Szymanski & was released in 2014.
It’s a first person POV with absolutely no indication of who you are playing, which adds to the unsettling atmosphere. You explore the environment around you & find you’re in a bunker with only hints & notes scattered around to tell the story. There are no jumpscares or anything like that in this game. But it’s none the less very disturbing. Especially when you reach the end.