CARRION is a reverse horror game in which you assume the role of an amorphous creature of unknown origins, stalking and consuming those that imprisoned you.
Picked it up because of this post, and I'm really enjoying it. You really get a sense of the "weight" of the creature as you move around corners and through narrow spaces and it's nauseating, in the best way. Reminds me a lot of John Carpenter's The Thing.
For me it wasn't about the graphics, but about the playtime. I got it at about the same price a couple years back. Took me less than 4 hours to finish the main game and DLC. That's not something I want to pay $20 for.