Metroidvania: Hollow Knight

It's obvious that you need something to progress beyond this point, but it's not immediately obvious what the thing that you're going to get is. And I really like that just not knowing in the mystery of it. Some of the things in Hollow Knight, you come up against these weird areas and you can probably intuit that there's going to be a dash and there might be some sort of a flying ability. It's not quite as cut and dry as that.