Not to be rude, but I don't consider that to be an interesting question. Quite the contrary, actually. Really, I mean no disrespect. Just trying to be clever in expressing how limiting it is for games to force so many contrived objectives into many of them. I'm so over that. The closest I can go is Terraria. There is a limited amount if bosses but after you kill them all you can just keep right on with what you were doing. And if you want, you can fight those bosses again.