Everything you need to get a Deathwatch army primed for games of Warhammer 40,000 is in here:

• 32 datasheets providing rules for using every Deathwatch unit in your games of Warhammer 40,000 – including Primaris Space Marines;
  
• Army abilities that reflect the Deathwatch’s methods of war on the tabletop; including the use of Special Issue ammunition;
  
• Armory of the Deathwatch: profiles for all weapons and wargear of the Deathwatch, ranged and close-combat
  
• Points values for all miniatures, weapons and wargear for use in Matched Play games;
  
• Hunters of the Alien: Rules for Battle-forged armies, including:
  
• 6 Mission Tactics: bonus abilities which last for an entire game;
  
• 29 unique Stratagems, including 5 used specifically against certain xenos races – Tyranids, Orks, T’au Empire, Aeldar and Necrons;
  
• Relics of the Vigilant: 6 weapons and artefacts available only to the Deathwatch;
  
• Librarius Discipline: 6 psychic powers specific to Deathwatch models with the Psyker keyword;
  
• 6 unique Warlord Traits for the Deathwatch;
  
• 6 Tactical Objectives unique to the Deathwatch.