Then, the Ultramarines player sets up Captain Aethon and his Legion Veteran Tactical Squad anywhere in the Ultramarines Deployment Zone. Roughly 500,000 Cultists from the Recursive Kin and the Ring, Brotherhood of the Knife, and Mandari [9a] The Word Bearers' use of Calth's orbital defence platforms against Calth's sun destabilised it, tore away the outer layers of its photosphere and threatened to cause it to explode as a supernova. The Veridian System's star, its colour changing from a bright yellow to an angry blue as its internal composition shifted, immediately suffered a flare trauma, and shortly after unleashed massive solar flares that irradiated Calth with lethal levels of radiation and stripped away its once dense oxygen-nitrogen atmosphere. A miracle occurs, as Primarch Roboute Guilliman intervenes in the vacuum of space, slaying the treacherous Word Bearers

I Horus Rising • II False Gods • III Galaxy in Flames • IV The Flight of the Eisenstein • V Fulgrim • VI Descent of Angels • VII Legion • VIII Battle for the Abyss • IX Mechanicum • X Tales of Heresy • XI Fallen Angels • XII A Thousand Sons • XIII Nemesis • XIV The First Heretic • XV Prospero Burns • XVI Age of Darkness • XVII The Outcast Dead • XVIII Deliverance Lost • XIX Know No Fear • XX The Primarchs • XXI Fear to Tread • XXII Shadows of Treachery • XXIII Angel Exterminatus • XXIV Betrayer • XXV Mark of Calth • XXVI Vulkan Lives • XXVII The Unremembered Empire • XXVIII Scars • XXIX Vengeful Spirit • XXX The Damnation of Pythos • XXXI Legacies of Betrayal • XXXII Deathfire • XXXIII War Without End • XXXIV Pharos • XXXV Eye of Terra • XXXVI The Path of Heaven • XXXVII The Silent War • XXXVIII Angels of Caliban • XXXIX Praetorian of Dorn • XL Corax • XLI The Master of Mankind • XLII Garro • XLIII Shattered Legions • XLIV The Crimson King • XLV Tallarn • XLVI Ruinstorm • XLVII Old Earth • XLVIII The Burden of Loyalty • XLIX Wolfsbane • L Born of Flame • LI Slaves to Darkness • LII Heralds of the Siege • LIII Titandeath • LIV The Buried Dagger It's been yonks since Rab Florence shared his thoughts on the original board game version of The Horus Heresy: Betrayal At Calth, although judging by his enthusiastic after-action report it can be a quite thrilling experience. As Games Workshop is wont to do these days, they've licensed out the rights to the PC adaptation to a lesser-known studio. Enter small VR outfit Steel Wool Studios. Cataphractii Terminators – weapon options include combi bolters, power fists, lightning claws, chain fists, power swords, heavy flamers and grenade harnesses Magos Tawren next redeployed the defence grid elements available to her, hitting other surface targets. Simultaneously, she re-tasked the orbital platforms and began to systematically exact punishment upon the Word Bearers' fleet. It was now the crimson-hulled warships of the XVII th Legion that were annihilated one by one. The dynamic of the entire battle had finally shifted in the Ultramarines' favour. The Ultramarines Force consists of Captain Aethon and one Legion Veteran Tactical Squad. The Word Bearers Force consists of one Legion Veteran Tactical Squad and Sor Gharax.Right… how do you play, then? Well, players alternate activating their units (which consist of up to three models), so you’re never going to be waiting around for a go. When it’s your turn your unit will be able to spend one of its tactical points to perform the following actions: advancing one hex, running two hexes, shooting, close combat or a model can consolidate itself to join up with a new unit. The forces of Chaos, acting through the Warmaster Horus, are making their move on the Emperor of Mankind. On the planet Calth, the Word Bearers – once loyal to the Emperor, now twisted by resentment and evil – chase down their former brothers, the Ultramarines. This two player game sets out scenarios that tell the story of this dark betrayal on Calth. House Vornherr - One of the largest Knight Houses in the Segmentum, House Vornherr was oathed to fight alongside the Five Hundred Worlds unto death. Aside from a small honour guard of squires and barons left on their home world of Luhnborg-IX, the entire Household, consisting of around five hundred Knights, were mustered at the Platia island-city in Calth's southern oceans. Full deployment at Calth, all at a nominal strength of 10,000 Legionaries. These Chapters were concentrated around Calth's primary spaceport at Numinus City in western Erud: The second big gift is a really awesome special armor set that ONLY CURRENT OWNERS OF THE GAME will have access to in Multiplayer. If you have Betrayal at Calth in your Steam Library, you'll get this armor!

At the same time that Lorgar had concentrated his Legion's offensive on Calth, a separate assault by the XVII th Legion on the Ultramarines' homeworld of Macragge had been prepared, using a massive prototype Battleship specially constructed by Horus' allies in the Mechanicum before the start of the Heresy known as the Furious Abyss. Just as bitter to the Ultramarines Legion was the damage inflicted on its fleet assets. Never renowned for the numbers of heavy combat voidcraft in its service, the losses suffered at Calth were crippling and hamstrung any effort to prosecute an interstellar war beyond the bounds of Ultramar.The first shots have been fired in the conflict that will change the future of mankind. Brother Legions of Space Marines taking arms against one another. The noble Ultramarines are betrayed on Calth by the zealous Word Bearers bent on tearing down the Imperium. A dark ritual ignites the system’s star, sending both Legions underground to battle for their honor, their belief, the fate of the Imperium, or just to survive. Enlightenment and knowledge are sundered; the Age of Darkness has begun in earnest. The Emperor’s glorious vision for humanity lies in ruins as his favoured son, Horus, has rejected his father’s light and embraced the corrupting tendrils of Chaos. Civil war has broken out amongst the Space Marines — once brothers, fighting side by side as the galaxy’s protectors, they are now a force divided. Some remain loyal to the Emperor, others have sided with the Warmaster. Nothing is certain, everything is at stake, and the Imperium is split down the middle... Armor on marines may sometimes not appear correctly, two known possibilities include marine heads becoming invisible at large distances, and shoulder pauldrons becoming invisible when certain weapons are equipped. The Battle of Calth, also referred to as the Calth Atrocity, was the name given by later Imperial scholars to the treacherous campaign conducted during the early stages of the Horus Heresy in beginning in 007.M31 by the traitorous XVII th Space Marine Legion, the Word Bearers, on behalf of the Warmaster Horus against their hated rivals, the XIII th Space Marine Legion, better known as the Ultramarines.

Gathering at Saturn those of his Legion who had been embarked on crusades in distant parts of the galaxy, Roboute Guilliman would depart the Sol System mere months before news of Horus' rebellion reached the Emperor's ears. The turbulent state of the Empyrean in those years would see the Ultramarines' main strength journey to Calth by a winding and obtuse trail which would also cloak them from all attempts by Terra to recall them or forewarn them of Horus' actions. The Word Bearers, delayed by the slaughter at Istvaan, would not arrive at Calth until the majority of the XIII th Legion had already gathered, travelling a path of blood and ashes of their creation. On the surface, havoc entered Leptius Numinus in the form of the daemon Samus, who had "entered" the compound in the body of the captured Commander Cxir. Ventanus only managed to slay it by the slimmest of margins [2s] [2t]. In coordination with Erebus on the surface, who had nearly completed his ritual, Kor Phaeron turned the orbital platform's weapons onto the Veridian sun itself. [2u] Endgame Suddenly the Primarch’s attention was diverted when he looked below their position and saw half a dozen surviving Word Bearers carrying the bloody carcass of Kor Phaeron. Somehow, the wretched First Captain of the XVII th Legion remained alive despite the fact that Guilliman had torn out his primary heart. Drawing their Bolters, the Ultramarines fired upon the retreating Word Bearers, just as their forms shimmered and vanished in a cascade of teleporter energy. Erebus had managed to complete his blasphemous ritual on Calth's surface, which summoned a Ruinstorm to the galaxy's Eastern Fringe -- a monstrous Warp Storm larger and more destructive than anything space-faring humanity had witnessed since the days of the Age of Strife. It would split the void asunder, dividing the galaxy in two and rendering vast tracts of the Imperium impassable for centuries.From the bridge of the disabled flagship Macragge's Honour, Guilliman swiftly deduced that the Word Bearers were opening fire on them, but attributed it to mistake on Lorgar's part. He transmitted urgent pleas for cease-fire, but when Lorgar refused to stop after a direct lithocast communication, Guilliman reluctantly authorized his forces to defend themselves, officially commencing the Battle of Calth at Mark Zero. [2i] Prosecution Two solar hours into the orbital battle, the Master of Vox of the Ultramarines flagship reported to Roboute Guilliman that the Word Bearers flagship, the Fidelitas Lex, had opened a lithocast-hailing channel. The Primarch of the Ultramarines stepped onto the holocaster platform at the centre of his bridge as the hooded figure of his brother Primarch Lorgar manifested before him in grainy hard-light. For perhaps the first time in his life, the famously measured Guilliman was lost to fury. He raged at his brother for his betrayal and swore to exact merciless vengeance. Guilliman denounced Lorgar's very sanity and swore that he and all his sons would be punished. But the Lorgar that listened to all of this with a smirk upon his lips and the remainder of his face hidden in shadow was not the being Guilliman had once known. No longer was Lorgar the cerebral seeker after truth who had debated the nature of the universe with his brother Magnus for days on end, nor was he the over-zealous son who had brought upon himself the censure of the father-Emperor he had decalred a god. Neither was Lorgar the chastened warrior who alone of all the Primarchs sought not conquest, but enlightenment. Here instead was a transcended being radiating a newfound self-assurance, as if he and he alone was party to knowledge still hidden from others, but which they would soon learn whether they willed it or not. No longer cowed or eclipsed before a more overtly purposeful or assured Primarch, Lorgar was the very essence of phlegmatic defiance. It reduced Traitor Titans, armoured vehicles, Chaos Cult auxiliary and Word Bearers infantry formations to so much ash within only seconds. However, the weapon strike occurred less than half a kilometre from where the Loyalists had taken shelter from the coming impact. Fortunately, amidst all this negative information, somehow Magos Tawren managed to discover a killcode that her former mentor Hesst had hidden within a secure data-engine at the Zetsun Verid Fleet Yard that had then been closed off from the rest of Calth's planetary network. This data-engine was the manifest Cogitator of the Cargo Handling Guild, which was located in a secured bunker in the industrial zone between Numinus Starport and the Lanshear landing grounds. It was responsible for running cargo operations for both Numinus and Lanshear, and thus was more than powerful enough to manage the data load of the planetary weapons grid. A Living Battlefield: While players decide on their next action or wait on their opponent, the world around them continues to animate and fight.