In the indie gaming world, it's quite rare to find a commercial-level game being offered for free. Of Light & Shadow is one great example of this. Created by a group of Austrian students, the gang proves time and again that sometimes all you need is creativity and dedication to create a game that's on par with some of the more successful commercial releases out there. This little 3D puzzle game involves two characters, Dr. Shadow and Mr. Light . As the name suggests, one can only move in light while the other in darkness.