"Game over" is a message in video games which informs the player that their play session has ended, usually because the player has reached a loss condition. It also sometimes appears at the successful completion of a session, especially 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. However, since the turn of the century, it has largely fallen out of fashion in favor of unlimited lives and endless checkpoints with autosaves, although it very much remains the norm in arcades, as they require payment inserts.