Sadie's story is a story told in Audiologs presenting a girl called Sadie Endesha and other characters. You find the first log in Mombasa Streets and go on acquiring them. When you get the first one, you get the "Listener" achievement. When you find 15, you get the "All Ears" achievement. When you get 30 (You need to get the 29 previous to get the 30th one) you get the "Audiophile" Achievement.