The Faceless
evocative details big on imagination and light on overlong prose
and secret cards provide useful prompts for developing your character and story but you are free to use your imagination and embellish all the details
Character templates to help players build their officers
There have been no substantive changes to the setting
The Horus Heresy: Liber Mechanicum bestsellers The FacelessThis 152 page hardback book contains: Background and lore: Information on the Mechanicum, their organisation, and examples of their forces. Rules and unit profiles: A guide to army building, plus rules for units, weapons, and Wargear available to the Mechanicum in Warhammer: The Horus Heresy. High Tech Arcana: Rules and Detachments for the following faction traits: Archimandrite, Cybernetica, Lacrymaerta, Myrmidax, Reductor, Malagra, and Macrotek.