Newly promoted to the captaincy of the Ultramarines Fourth Company, Uriel Ventris leads his warriors to the world of Pavonis, where vicious alien raiders are bringing death and destruction. As Pavonis descends into political turmoil, Uriel and his warriors must battle the xenos as they unravel a plot to unleash an ancient evil buried deep beneath the world - the mysterious and deadly Nightbringer.

In the age of the Dark Imperium, Primarch Guilliman’s Primaris Ultramarines are a shining beacon in the darkness of war. On the Imperial Hive World of Ikara IX, Chaplain Kastor and Apothecary Polixis, brothers in blood as well as in battle, stand firm against the endless Greenskin horde. But a threat is looming. An invasion like no other assaults the broken city of Shebat, as the crazed warlord Urgork arrives to lay waste to the Imperial forces and capture a Primaris Marine for his own twisted ends.

The eldar are an ancient race whose mode of war blends spirituality with a unique mastery of technology. In times of need, their entire race will rouse to war, led by terrifying, almost mythological figures - the phoenix lords, immortal beings that embody the warrior nature of the eldar. When a burgeoning ork empire starts to pose a threat to the eldar peoples, Jain Zar travels to the craftworld Ulthwé to warn them of the danger.

The Great Devourer is descending on the world of Tarsis Ultra, but to defeat the xenos horrors, Captain Uriel Ventris may have to embark upon a dangerous and unorthodox mission.

The Aeronautica Imperialis are the masters of the skies in the 41st millennium, waging wars of breakneck aerial combat where only skill stands between victory and death. Flight Commander Lucille von Shard is an ace, a living exemplar of what it means to fly in the name of the Emperor… or so Propagandist Kile Simlex is told. Braving the foetid waters of Bacchus and its rampaging greenskin hordes, Simlex is tasked with producing a cinema-pict portraying Shard as an Imperial hero. Shortly after his arrival planetside, however, he discovers the war effort is in shambles.

The Battle Titans of the Adeptus Titanicus are towering war engines, striding to war as holy effigies of the Omnissiah. Greatest of all are the mighty Warlord Titans, their weapons bringing righteous death to alien and heretic alike. Still reeling from a near disastrous battle against tyranids, the Pallidus Morr demi-legio is assigned to a new warzone, a nearby forge world which has fallen under the sway of Chaos.

In the wake of an apocalyptic war against the alien tau, the White Scars take to their bikes and hunt the fleeing commander of the xenos forces across the plains of Voltoris. As they chase down their quarry, the Brotherhood of the Running Star begin to realise one inescapable truth: that this will be their final hunt. But if Suljuq Khan and Stormseer Checheg are to die this day, they will ensure that they take the alien Shadowsun into oblivion with them....

The war for warp-cursed Croatoas rages on. Hailed as 'Giant-killers' for their heroics during Operation Jotunn, Lieutenant Commander Hadeya Etsul and the crew of the Leman Russ Demolisher Steel Tread are hurled right back into battle. Assigned command of a convoy of armour and infantry, Etsul is tasked with escorting a legendary lord commissar through contested territory to stabilise the wavering Ruega Front.

Uriel Ventris, newly ascended to the ranks of the Primaris, leads warriors of the Fourth Company from the Indomitus Crusade of Roboute Guilliman to a world on the frontiers of Ultramar. Once a battleground against the orks, Sycorax is now under furious assault from an enemy of ancient times – the necrons. The Ultramarines have faced these baleful xenos before, but Uriel senses the hand of a foe from his past at work on Sycorax, a tally unfinished and a debt to the Imperium finally come due.

There are those in the great expanse of the galaxy that seek profit wherever it is to be found: the deal makers, the opportunists and explorers – the Rogue Traders. Granted power by an ancient charter, sanctioned by the Emperor Himself, these scoundrels, entrepreneurs and adventurers roam the galaxy in search of fortune and glory. None perhaps are as hungry for these twin vices as Janus Draik.

Lord Azariel, Head of the Navigator House Brobantis is dead. His widow and murderer, the Lady Chettamandey, stands to inherit his power and influence. Her plans for ascension are curtailed when she’s drawn into a dark world of ritual killings and cult murders. With planets being dragged into the warp seemingly at a whim, the threat to Chettamandey’s legacy is dire, and only she can avert potential disaster.

The Horus Heresy is a civil war on a scale the likes of which the galaxy has never seen before. After the Great Crusade united the disparate worlds of humanity, the very warriors who made it possible turned on each other and tore it apart. The Siege of Terra looms, and the fate of the galaxy balances on a razor's edge.

The Blood Angels Chapter of Space Marines is under threat. Having obliterated all human life in the Red Scar region of space, the largest tendril of Hivefleet Leviathan ever seen in the Imperium has converged and is making relentlessly for Baal. To face this awesome foe, Commander Dante has called upon the Successor Chapters of the ancient Ninth Legion. The Sons of Sanguinius gather in numbers not seen since the dark days of the Horus Heresy.

By the blessing of the Omnissiah was the Mars Triumphant born – from the forges of the Adeptus Mechanicus, the mighty Baneblade super-heavy battle tank comes to bring death and destruction to the foes of the Imperium. As part of the Paragonian 7th Company, Honoured Lieutenant Marken Cortein Lo Bannick commands the venerable war machine in a bitter war against the orks in the Kalidar system. As the campaign grinds on it begins to take its toll upon his crew, and old clan prejudices from the regiment's home world arise once more. In a war which cannot be won by force of arms alone.

After the Great Crusade united the disparate worlds of humanity, the very warriors who made it possible turned on each other and tore it apart. This war was not only fought on a galactic scale – it was contested a million times over in brutal battles between former brothers and allies. Since the near-destruction of the Iron Hands, Raven Guard, and Salamanders on Isstvan V, scattered warbands from these 'Shattered Legions' have waged a guerrilla war on Horus' forces across the galaxy.