어야 끝나다

it only ends when X

-아/어야 states the one thing that will bring it to a close, and 끝나다 is the ending: 맞혀야 끝나는 게임입니다 'it's a game that only ends when you get it right', 사과를 해야 끝날 상황극. It suits games with an exit condition and, more darkly, deadlocks — 누구 하나는 죽어야 끝나는 게임, 'a game that only ends when someone dies'.