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 only in the second year of his career must deal with a bounty that has been placed on him by crime lord Black Mask , who has lured eight deadly assassins to Gotham on Christmas Eve , as well as uncover the mystery of the Joker .
Batman-COLON- Arkham