So tron is a movie as well as a game?
You must have beamed down just recently... :O
It's just THE film that started cgi use in films, sort of über classic that every geek knows just as well as their pac-mans and space invaders... oh, and yes, Tron is a game too. In fact there must be dozens of them but Tron 2.0 was the Triple-A title.
Sorry for ranting but I just got so flabbergasted :)