WarGames is a 1983 American techno thriller directed by John Badham, starring Matthew Broderick as a young hacker who accidentally accesses a military supercomputer. The system, WOPR, is also called Joshua and learns through games like chess and tic tac toe before mistaking a nuclear simulation for reality. Its polite invitation became one of the film's most quoted lines, and it keeps resurfacing in gaming videos, AI jokes and hacker culture as shorthand for a computer challenge that could go very wrong.