The Last Starfighter

The Last Starfighter is a 1984 American space opera film directed by Nick Castle. The film tells the story of Alex Rogan Lance Guest, an average teenage boy recruited by an alien defense force to fight in an interstellar war. It also features Robert Preston, Dan OHerlihy, Catherine Mary Stewart, Norman Snow and Kay E. Kuter.

Alex Rogan is a teenager living in a trailer park with his mother and little brother, Louis. Alex often plays Starfighter, an arcade game in which the player defends the Frontier from Xur and the KoDan Armada in a space battle. He becomes the games highestscoring player, and is approached by the games inventor, Centauri, who invites him to take a ride. Alex does so, discovering the car is a spacecraft. Centauri is an alien who takes him to the planet Rylos. An android duplicate named Beta takes Alexs place during his absence.Alex learns that the characters and ships in the Starfighter arcade game represent a conflict between the Rylan Star League and the KoDan Empire the latter is led by Xur, a traitor to whom the KoDan Emperor has promised control of Rylos. The game was designed as a test to find those with the gift Alex is expected to pilot a Starfighter spacecraft called the Gunstar. He also learns that the Frontier is an array of satellites creating a forcefield protecting Rylos and its surrounding planets from invasion. Xur has given the KoDan the means to breach the forcefield. ........

Source: Wikipedia