Finger bones is a free to play short game. It is not just any game it is a psychological horror game where you have to read the pages around the abandoned building to find clues to open the bunker and locked doors.
You also have to use the keyboard on the desk to put the passwords in and it can be a little tricky.
I personally liked this game but it is kind of messed up if you think deeply about it cause some of the pages you read are just weird.