I started playing Blue Prince. It's a puzzle game where you have inherited your uncle's 45-room mansion, but only if you can find the 46th room in it. And every day, the layout changes.
At the start it's kinda like a map building roguelike where you pick which room is behind each door from a few choices, and try to gather resources and explore further, but that's barely scratching the surface.
This puzzle goes so deep. I have a journal full of clues, in-game books that I have copied in hopes that there are more clues, pages with in-depth descriptions of every room, family trees, weird interactions that I haven't fully figured out yet... There's all sorts of lore about this fictional world that I have been writing down just in case. I don't even know how deep this mystery goes, but I hope to be well-armed when I finally do.
It's the first game that's scratched the same itch that Outer Wilds does, where you occasionally discover something that forces you to reevaluate everything you saw before, but it's much harder. Also the in-game notekeeping is incredibly limited so you really need to keep your own journal to play.