The Slay Sum - Batman: Arkham Knight

Alternate Title - ClownPuncher goes crazy counting background decorations that 90% of players never even knew existed. Please like, comment, and subscribe so all his pain and suffering was worth it. And do not expect anything from the DLC, Origins Blackgate, or Assault on Arkham, because he will not be returning to this miniseries for a LONG time.
Batman: Arkham Knight is the final installment in the Arkham franchise, and also the most ludicrously difficult to count. Batman is an unreliable narrator for 80% of the game, so we never really know if what we're seeing is real or not. Ask anyone else to do this sum, and they'll probably end up with a wildly different count than me. It's impossible to get an accurate count, so just bear with me as I do my best to get an accurate number.
Music
Fear Within
Bodycount
Scum, Criminals, and Worse
Evening The Odds
Prophecy
Darkest Knight
Gunrunner
Zeppelin
All Who Follow You
Dark Skies
Last Stand
Inner Demon
Insurgency
Predator
Pursuit
Vendetta
Lost Soul
Contingency