Tron (1982)

Computer hacker Kevin Flynn is a former employee of the software corporation ENCOM, now running an arcade. Flynn has been trying to find proof that five video games he created were stolen by ENCOM's senior executive Ed Dillinger. In response, he is split into molecules by a digital laser and transported into ENCOM's computer. In this computer, a megalomaniacal program called Master Control dominates the digital world like a dictator. Flynn who programmed a number of features of the environment he got into, teams up with a bookkeeping program and his girlfriend, and together they try to replace Master Control with Tron. Tron is a heroic security program who monitors communications between the Master Control Program and the real world.