Tron is a movie based on gaming concepts and has seen a few video games released based upon its universe. The principal video game in the movie Tron, however, was a title called Space Paranoids that has never been playable in any form... until now.
As part of the viral marketing for the movie Tron Legacy, fictional Encom Corporation has released a playable version of Space Paranoids. There are apparently codes hidden within the game itself that unlock production photos, so there's plenty more to uncover than just getting to the next level.
Check out the game at www.spaceparanoidsonline.com