‘No matter how well defended the enemy’s sanctum, no matter how elite the warriors that guard it, no site of alien power or worship is safe from the wrath of the Deathwatch.
It is they who bring the Emperor’s cleansing flame, slaying foul xenos warlords and toppling inhuman idols to break the unclean spirit of their foes.’
(Codex Adeptus Astartes Deathwatch)

This DLC will add more than 15 variants of Deathwatch armour visual appearances to the game for all classes of the main character and his squadmates, as well as the ability to turn the display of helmets on or off.