I played the demo at release (as I'd liked Papers, Please), and it completely failed to grab me—aside from the art style, which seemed to me to be "wasted" on such a dumb gameplay concept.

then I picked it up years later, earlier this year, and was absolutely hooked. I practically couldn't put it down until I finished. one of my top games of all time. a perfect example of how video games, as a medium, can tell stories in ways that other media never could—an excellent counterexample to cutscenes and dialogue trees being the accepted industry standard for storytelling.