: This is a critical free PDF for veteran players. It provides updated rules for "Legacy" units—older Forge World models that aren't in the main Liber books but remain fully playable in both casual and tournament games.
: Weapon profiles were overhauled with fixed Damage characteristics and new rules like Brutal (X) , leading to faster, more decisive combat. Unit & Vehicle Updates
: High Weapon Skill is more impactful; you can hit on 2s if your WS is double the opponent's, rewarding elite melee units. Comparison: 1.0 vs. 2.0 1.0 (Old Edition) 2.0 (Current Edition) Player Engagement Static during opponent's turn Active via the Reactions system Dreadnoughts Hull Points (Fragile to one-shots) Wounds (Very durable "Elite Infantry") Psychic Powers Dedicated, often lengthy phase Integrated into standard phases Wound Allocation Closest model must take hits Controlling player chooses who takes hits Accessibility Highly spread across "Black Books" Consolidated into core books and Libers Community Resources
Here is what you actually need to know about the core systems, the 20 Legions’ unique traits, and how to access the rules legally.
For those searching for the most efficient way to learn or reference these rules, several community-curated and official PDFs are invaluable: Age of Darkness Rulebook - The Horus Heresy - First Look
If you want a better ruleset, not just a better layout, look to the Liber Panoptica . This is a fan-made overhaul that is widely considered superior to GW’s official balance for narrative play.