In Arkham Origin , Black Mask has enlisted world 's deadliest assassins to eliminate Batman .
Arkham Origins ( 2013 ) is a prequel set five years before the events of Arkham Asylum in which a younger and less-refined Batman , who is only in the second year of his career , must deal with crime lord Black Mask , who has put a bounty on the Dark Knight 's head , luring eight of the world 's deadliest assassins to Gotham on Christmas Eve .
Batman-COLON- Arkham