I can't recommend Obra Dinn enough. It's a one and done game, but the experience is pristinely polished. There's nothing else like it, and it proves that Lucas Pope means it when he says he uses the limitations of the art style as a way to improve the work.

I play it about once a year, having forgotten a few of the details of the story/gameplay each time, and really wish I could neuralyze myself to play it again for the first time.