One of my favourite arcade games: "Emergency Call Ambulance". The idea of the game is you have to drive a critically ill person to the hospital in the quickest time possible. If you crash into anything along the way the patient's condition worsens, and the amount of time you have left decreases. Failing to get to the hospital in time results in a black screen accompanied by the sound of your unfortunate patient flatlining. It's a rather disturbing feeling to walk away from an arcade machine knowing that your actions resulted in the death of a young boy... A uniquely morbid game.