Have you played Lose/Lose?
As the author describes “Lose/Lose is a video-game with real life consequences.”
This game works only in Mac, and as the warning explains, this game deletes files whenever the player kill those aliens. Yes, it is interesting but unfortunately it poses serious threat to users.
So, if you’ll happen to see this screen, I advise you to immediately quit the application (Command + Q) before it’s too late!