THE HORUS HERESY Betrayal Gaming Weekend - U.S. - v0.5 - Event rules and scenario background

Oct 7, 2026

Unofficial event weekend guide for The Horus Heresy: Betrayal, updated for the U.S. Heresy 30k national game month. Provides event purpose and narrative framing, ticket pricing and prize breakdown for Best Painted Army plus Loyalist and Traitor winners, and logistics for registration and an attendee pack. Includes story overviews covering the Emperor and Crusading Sons, Horus’s sedition, the Isstvan III betrayal, and a traitors’ strike that reshapes the conflict.

LanguageEnglish

CategoryComic

FormatPDF

Pages13

Reading Time5 min

AccessFree to download

Introduction

Buying Your Ticket

Arriving at the Event

The Betrayal

The Emperor and his Crusading Sons

Seeds of Sedition

The Traitors Strike

Brother against Brother

THE HORUS HERESY Betrayal Gaming Weekend – U.S. Rancho Cucamonga, California January 24th-26th, 2014 v0.5 A completely unofficial adaptation of the official GW supplement updated for the Heresy 30k U.S. national game month. No challenge is made to the rights or ownership by Games Workshop of the material below. Any additional or changed content in this document is completely unofficial and is in no way endorsed by Games Workshop Limited. Introduction Welcome, Legionary, to The Horus Heresy Book One: Betrayal weekend. This event is unlike any other, where you will enter into the devastating and ruinous opening conflict that caused the Imperium to be torn asunder. You will also witness the pivotal moment where the most proficient fighting force humanity has ever known – the Legiones Astartes – turns upon itself. Whether you fight for the Emperor or the Warmaster know this: here legends will be born, heroes will die and the fate of the galaxy will be changed forever. Prepare for Betrayal. Barnaby “Overseer” Newton Warhammer World Betrayal Weekend UK Buying Your Ticket Tickets to the event will be $20.00 – 100% of this cost will go towards providing prize support for the event. There will be major prizes given to the winner of Best Painted Army (Magos Reductor), as well as to the top-scoring player from the Loyalist (Born Survivor) and Traitor sides (Marked by Dark Fates) . There will also be minor prizes for a number of other winners, detailed below. Arriving at the Event The event organizer will be available at Dice of War Games-9047 Arrow Route, Rancho Cucamonga, CA 91730 (909-484-3423) between 5pm-10pm on the Friday for those who have arrived early , and also on Saturday morning at 8am before the event starts at 9.30am. Once you have settled in and registered we will give you a pack containing everything you will need for the weekend, including a record sheet to track your heroic deeds and uncounted sacrifices across the weekend. The Betrayal The Emperor and his Crusading Sons The realms of man have been cast down and split since a time lost in the distant past known as the Age of Strife. Risen from the ashes, the Emperor conquered Terra through bloody wars and embarked on his Great Crusade to unite the forlorn human worlds and forge His Imperium of Mankind. At the helm of this campaign are his chosen sons known as the Primarchs; immensely powerful beings created by science and sorcery to do what no other human could – lead the armies that would conquer the galaxy in the name of Mankind. Greatest of these was Horus; the favoured and most beloved son of the Emperor. After two grueling centuries of battle, the Emperor had informed his Primarch sons that he must return to Terra to carry out the next stage in his mysterious work. Seeds of Sedition Now proclaimed Warmaster of humanity’s armies, Horus became disheartened with the way in which the Emperor had appeared to relinquish all responsibility of his new fledgling Imperium. Horus, influenced by some unknown outside power, believed that he should be the ruler of the Imperium. With new determination he put into motion plans to win over his brother Primarch and convince them to join him in his new righteous quest to overthrow the Emperor. Amongst the first to march under his banner were Mortarion of the Death Guard, Fulgrim of the Emperor’s Children and Angron of the World Eaters. In secret they decided that they would establish who within their own Legions would be faithful to Horus, and which Legionaries would remain loyal to the Emperor. Horus took the opportunity to act on the world of Isstvan III, a previously compliant world but now in the thrall of a seditious uprising. Horus and his fellow conspirators discerned who in their ranks were loyal to the Emperor, and by ‘coincidence’ these were formed into fighting units and given the honour of spearheading the assault to inevitably subjugate the rebel population. Shortly after the ground

FAQs

What is the purpose of The Horus Heresy: Betrayal weekend?

The event frames players entering the opening conflict behind the Imperium’s rupture, focusing on the moment the Legiones Astartes turn on each other. It emphasizes that legends are born, heroes die, and the galaxy’s fate is altered.

How much do tickets cost and how are prizes awarded?

Tickets cost $20.00, with the full amount funding prize support. Major prizes go to Best Painted Army, and top scorers for both the Loyalist and Traitor sides, with additional minor prizes for other winners as detailed later in the document.

What should attendees do when arriving, and what will they receive?

The organizer is available for early Friday check-in and on Saturday morning before the event starts. After settling in and registering, attendees receive a weekend pack including a record sheet to track achievements and sacrifices.

Oct 7, 2026

Upload by Taylor Morgan