One of the biggest ideas at this year's E3 comes from a tiny indie game called Scale. It's a twist on a first-person shooter that lets you change the size of anything in the gameworld. In the video above, you'll see entire levels get shrunk down so you can cros them with a single step and butterflies swell up to disturbingly giant proportions. Designer Steve Swink's ambitious title isn't anywhere near release yet but it could be the kind of experience that changes how you look at a video game environment and what you take for granted about playing through a virtual environment.