Rocksteady's New batman final Arkham Series - Batman Arkham Knight. Now you can pre-order the game from amazon or any other places. Exclusively you can play as "Harley Quinn" in Arkham Knight. It's a very precious gift to gamers who eagerly waiting to play as Harley Quinn.. She is very high intelligence in combat mode. So after you pre-order then you'll get add-on to play Batman : Arkham Knight as role of Harley Quinn. So don't forget to pre-order for your gaming consoles.