Yeah. Wait. What? ReROLL's ultimate aim is to map the entire world (that is, planet Earth) using autonomous drones in order to make an enormous videogame map. This will be done over long periods of time and in sections, of course. Apparently they can't even start on the United States until drone regulations are hammered out next year, so the first bit of game, "Brick 1" will not take place in the US.
You need to eat, rest, and exercise to manage your character, whether you settle down or roam the world as a nomad. You can catch some interesting prototype footage in the video of someone driving a snow mobile searching for useful things in the environment.
There's a whole bunch of explanations of this game's crazy plans over at its website, including funding plans, alpha and beta plans, and more. Quite the wild project this is.