For further detailed rules or specific unit profiles mentioned in Tempest , you can refer to the official Warhammer 40k Wiki or community lore hubs like Lexicanum. The Horus Heresy: Book Five - Tempest (Forge World Series)
The is a massive 270-page "black book" from Forge World that focuses on the Betrayal at Calth , detailing the Word Bearers' surprise attack on the Ultramarines. Key Highlights of Tempest
Meanwhile, the story also explores the background of the Laeran system, which holds secrets and mysterious energies that have a profound impact on the battle. Abnett masterfully weaves a complex tale of war, politics, and sorcery, as the characters navigate the intricate web of loyalties and rivalries.
Book Five: Tempest completely transformed the landscape of the tabletop hobby by introducing comprehensive lists that remain iconic to this day. Feature / Army List Lore Focus Tabletop Impact Primarch of the XIIIth Legion
Rules for representing the human troops caught in the crossfire. The Betrayal at Calth Campaign
Throughout the book, McNeill explores themes of loyalty, duty, and the nature of heroism. The characters are faced with impossible choices and must confront the reality of their own mortality.
Loyalist elements of the 112th Chondrax Mechanicum (the ‘Cog-Scarred’) make a desperate last stand within the primary coolant cisterns of Forge-Temple Delta. The image, captured by a dying servitor-skull, shows the sickly green glow of radiation-fog mingling with the promethium fires of a ruptured plasma relay.
The air above didn’t just smell of ozone and promethium; it smelled of betrayal. Aetius of the Ultramarines
For modern players looking for the units introduced in Tempest , buy the current Horus Heresy rulebooks. They contain fully updated profiles for Roboute Guilliman, Lorgar, and their respective legions.
As the antagonists, the Word Bearers received significant updates. Tempest is the primary source for their corrupted war machines, including the terrifying Mhara Gal Tainted Dreadnought and the possessed Gal Vorbak Dark Brethren .