Wiktionary
bad ending
n. (context video games English) An ending that occurs when the player finishes the video game but is not completely successful for some reason, as opposed to a good ending.
Usage examples of "bad ending".
It will not be a bad ending for one of the House of the Broken Sword.
It would be ritualistic and hypnotic, and a man like Fort would feel guilt and shame, but it would be cushioned by his knowing that no matter how wretched the inevitable ending of it would be, the bad ending of marriage and the bad ending of his wife's life was just as inevitable.
Trevor, irrespective of the hard feelings and bad ending to that involvement.
Edward thought it was a bad ending to their conversation, but started to hang up the phone anyway.