Tron (1982)

"Journey now into a startling new dimension where energy lives and breathes. A world inside the computer where man has never been. Never before now."

When brilliant video game maker Flynn hacks the mainframe of his ex-employer, he is beamed inside an astonishing digital world and becomes part of the very game he is designing. In his mission through cyberspace, Flynn matches wits with a maniacal Master Control Program and teams up with Tron, a security measure created to bring balance to the digital environment.