In the forty-year history of the video game industry, the medium has undergone staggering development, fueled not only by advances in technology but also by an insatiable quest for richer play and more meaningful experiences. From the very beginning, with the introduction of the Magnavox Odyssey in 1972, countless individuals became enthralled by a new world opened before them, one in which they could control and create, as well as interact and play. Even in their rudimentary form, video games held forth a potential and promise that inspired a generation of developers, programmers, and gamers to pursue visions of ever more sophisticated interactive worlds.