User blog comment:BlackcoatZealot95/Kill Every single person... with a catch!/@comment-26007095-20151206030014/@comment-16241899-20151206071210

I was referring to the fact that you put up the task to hide all the bodies from sight to get the ghost rating. I am on a ghost run right now, and I got Ghost checked in every mission so far although a few bodies were found. You get Ghost rating as long as you are not seen, your victims may.

Okay, granted, my ghost run is also a no-kill run, so there is not that much bodies to be found to begin with, because I just go around the enemies whenever possible. I can imagine that it will get a lot harder to keep ghost rating if you have guards stumble across dead bodies all the time rasing their awareness and making them look for you.