I checked Roottrees out at 9:50pm thinking I'd take a quick look, see if I was interested, then save it for another day. Instead I stayed up all night and finished it at 7:20am because it ended up being so damn engaging. I practically did the same thing when I played Obra Dinn, though that game was big enough that I needed two sessions. But that is to say, Roottrees truly scratched the same itch as Obra Dinn. Great game.