 In "Deathwatch", players take the role of surgically modified super humans known as Space Marines.These individuals are recruited from their native Chapters (fighting units of approximately 1,000 people) to serve as a military arm of the Inquisition, against particularly dangerous heretics known as Chaos worshipers and alien lifeforms known as Xenos.In "Black Crusade", players take the role of Chaos-corrupted characters.