WarGames (1983)

David Lightman, a clever high schooler with a knack for hacking, stumbles upon a top-secret military computer while attempting to access unreleased video games. This accidental breach triggers a series of events that could lead to worldwide catastrophe. With the help of his friend and an eccentric computer whiz, David embarks on a frantic mission to outsmart the system and avert a nuclear disaster before it’s too late.