The prequel to that one game that may or may not be real.

Hollow Knight is an interesting game. I don't usually play Metroidvania's besides...well...Metroid. It was recommended to me by a good friend so I gave it a shot, and turned out to be very pleasantly surprised. You can tell this game has a ton of passion behind it. From the level design, to the tight controls, to the bosses; a lot that this game has to offer is great. There's also some incredibly interesting lore if you're the type of person who cares to look for it. Overall this is really just a stellar game, I don't really have anything negative to say about it.