expression
game over
Used in video games when the player loses all lives or fails a mission. Also used metaphorically to mean a situation is hopeless or finished.
ボスに負けてゲームオーバーになった。
I lost to the boss and got a game over.
このミスでプロジェクトはゲームオーバーだ。
With this mistake, the project is game over.
Variant with interpunct; less common in everyday use.
Borrowed from English 'game over', used in Japanese video games since the early arcade era.