Here is the announcement made by Fantasy Flight Games.
– A Treatise on the End of the Imperium, denounced and burned in 800.M41
It is the 41st millennium, a future in which the vast Imperium of Man stretches light-years across the galaxy. The wildly popular Warhammer 40,000 universe is one of constant strife; for untold billions, merely to be born is to be condemned to a lifetime of cruel suffering under an unforgiving and draconian regime. Only a select few in positions of power possess limited freedom: the Inquisitors who hunt heretics, the Rogue Traders who gather wealth, and the Deathwatch Space Marines who combat the alien threat. Science and technology offer little promise of relief; too much has been lost since the Dark Age of Technology, and all that is left goes to fuel the Imperium’s mighty war machine. It is a universe of grim darkness.
The intoxicating lure of Chaos leads untold millions down the path of corruption, and the noblest of intentions offers little protection against its dark influence. A soldier’s bloodlust, a politician's ambition, a lover’s desire, and even a mother’s whispered prayer over her feverish child – they are all the playthings of the Dark Gods. Why resist? Wealth, power, and happiness await those who serve the Ruinous Powers, and the only price is your humanity.
Black Crusade is a remarkable standalone RPG that offers players an entirely new perspective on the conflict between the Imperium of Man and the forces of Chaos. This groundbreaking concept delivers the unprecedented opportunity to play as a Disciple of the Dark Gods, whether as a Chaos Space Marine or a human Servant of Chaos.
Swear allegiance to your dark masters, and reap the rewards of their favor! The Black Crusade core rulebook contains everything you need to start your adventure in the Warhammer 40,000 universe.
You can find out more here at Fanstasy Flight Games