Researchers at Delft University of Technology (TU Delft) have designed a portable game console powered by solar panels and a cranking device. They embedded the crank into the gameplay experience, allowing users to—for example—fire a weapon in DOOM, or change the speed of Tetris blocks. They discovered that gamers respond positively to these innovative experiences, and they see huge potential in new, sustainable and battery-free ways of gaming that are also better attuned to our body's movements.