It was part of a GamersGate bundle along with other games I was more interested in, possibly years ago, though the bundle itself was very cheap and thus the alpha version of Underrail was almost free for me. And get this, I was just looking for games in my gaming libraries to play today (!) when I stumbled upon Underrail and realized that it's about to come out tomorrow! And more than that, reading about it revealed that it does look kind of awesome. So, I'm very intrigued now and glad I noticed it "gathering dust".