Is there free will?" you decide the answer is yes. But that's the question Sentient poses as it locks you in a tiny room, a mysterious and brutal first-person horror game not to be confused with the ambitious adventure games of the 90s.

In a miserable little cell, you and a voice over the speaker system are instructed to do inexplicable things. Turn around repeatedly. Face that wall, and so on. Then, to answer a "yes" or "no" question, you throw a tennis ball to the left or right side of the room.

This "playable teaser" is for a big Forma project and doesn't really go anywhere. But it does give us a glimpse into a disturbing and eerie world, and I'm curious to see what Forma has to offer next.

For more great free experiences, check out our roundup of the best free PC games.