Also of note in the GOG sale is King of Dragon Pass for US$1.49. There is very little reason not to pick that game for that price.
One of the best games ever made. There's nothing like it. I got it mobile and love it.
I disagree, I think it's incredibly overrated and don't understand why people like it so much.
It's super, super RNG based. You thought FTL was RNG based? This is 10000x worse. Even with everything set up perfect, sometimes you just lose because enemies raided you 4 times in a row then you got some bad events and there was literally nothing you could do, you just lose because RNG.
The difficulty is almost completely front-loaded too. Once I finally got lucky and survived the early game I was just steamrolling everything, had thousands of everything in stock, and buffed up clan ring with heroic skills. People would raid me but I had every war blessing and hundreds of magic, so I'd lose 1 - 2 guys and they would lose hundreds (and they kept coming back for more anyway). I ended up boringly mashing end turn over and over for around 10 years (1 year = 10 turns, so 100 turns of mashing "next turn") getting the same few events over and over before the game finally let me win.
The concept is amazing, but the actual game is not, which is very unfortunate.
Edit: I don't mean to suggest anyone is bad for liking it, just trying to offer another opinion. For $1.50 though it's so cheap if you think it sounds interesting you might as well get it and decide for yourself.. and if I'm being honest even though I didn't like it very much I probably got $1.50 worth of entertainment out of it.