So here I am waiting for a "funicular" and I've got all these mines and a cute little robot with machine guns guarding the doors, but for some reason I can't get the ghost award. The radar doesn't go red or say hostile. No one sees me. Everyone dies within about 3 seconds. I've tried different ways for about an hour without getting it.
Did anyone actually get ghost here? Is it even possible? If you did, how?