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Take on Gotham City's most notorious criminal kingpin in the Black Mask Challenge Pack. Unlock two all-new Black Mask-themed challenge maps: Lot Full and Hidden Facility. Play as either Batman™ or Deathstroke and show Black Mask who really runs Gotham!
Note: To play as Deathstroke, you must own the Deathstroke Challenge Pack. This content requires the base game Batman: Arkham Origins in order to play.
1. Download, install and run installer STEAM.
2. After the game run, create your STEAM account according to instructions on screen, after that go into tab Games, options for product activation on Steam, copy the game bought game key from your KeenShop account
3. After this procedure the game and it's parts is present at Games tab.