zorg1000 on 20 December 2018
Found this on the wikipedia page for Arkham Knight:
"At release, the game was the fastest selling game of 2015, and the fastest selling game in the Arkham series, reaching over 5 million units sold globally by October 2015"
That was over 5 million in ~4 months so Spidey is over that.
When the herd loses its way, the shepard must kill the bull that leads them astray.
