This 352-page hardback book contains:

– Age of Darkness background and lore.
– Basic principles: The Core Rules for Warhammer: The Horus Heresy.
– Advanced principles: Rules for Tactical Statuses, Reactions, Psychic Abilities, Vehicles, and Battlefield Terrain.
– Rules of battle: A guide to the phases of the game.
– Battles in the Age of Darkness: Instructions on how to build your army.
– Core Mission Pack: Three Core Missions, three Deployment Maps, and a variety of Secondary Objectives for your games.
– Armouries of the Age of Darkness: Special Rules for Warhammer: The Horus Heresy and Psychic Powers for the six Psychic Disciplines.