WarGames (1983)

WarGames AKA War Games

A young computer whizz kid accidentally connects into a top secret super-computer which has complete control over the U.S. nuclear arsenal. It challenges him to a game between America and Russia, and he innocently starts the countdown to World War 3. Can he convince the computer he wanted to play a game and not the real thing?

Sequal to: WarGames: The Dead Code (2008)

See: WarGames at Wikipedia