Only 15 bucks - I've had my eye on this and picked it up. It's pretty great - like some of the reviews have said, it's kind of like Oblivion without the monsters. Very chill, very pretty. Good sense of wonder as the world unfolds around you.
Also FYI - I fired it up on Proton 4.11 and it works perfectly fine on Elementary OS (Linux) with a Vega 64.