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Release date: 26 July 2025
Narrative gaming supplement for Warhammer: The Horus Heresy
Focus: the Loyalists' initial strike on Isstvan V
Setting: the Age of Darkness
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The moment the civil war came out into the open. This narrative supplement digs deep into the opening strike on Isstvan V — the Dropsite Massacre — when brother first opened fire on brother and some Legions were broken forever.
At a glance
Narrative gaming supplement for Warhammer: The Horus Heresy
Focus: the Loyalists' initial strike on Isstvan V
Setting: the Age of Darkness
English Language Version
What's inside
Additional rules and unit profiles for your Legiones Astartes armies
A Legendary Scenario representing the Loyalists' first assault
Background on the events that lit the fuse of the Heresy
A must for Horus Heresy players who want to refight one of the setting's defining battles.
A must for Horus Heresy players refighting the Dropsite Massacre. Pairs naturally with the wider Horus Heresy range.
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