Game over

"Game over" is a message in video games which informs the player that their playing session has ended prematurely, due to misfortune such as losing all of one's lives or failing a critical objective. It also sometimes appears at the successful completion of a session, usually in games designed for arcades, after the player has exhausted the game's supply of new challenges. The phrase has since been turned into quasi-slang, usually describing an event that will cause significant harm, injury, bad luck, or even death to a person.