It is the 41st Millennium…
For more than a hundred centuries, the Emperor has sat immobile on the Golden Throne of Earth. He is the master of mankind by the will of the gods, and master of a million worlds by the might of his inexhaustible armies.
He is a rotting carcass writhing invisibly with power from the Dark Age of Technology. He is the Carrion Lord of the Imperium for whom a thousand souls are sacrificed every day so that he may never truly die.
Yet in his deathless state, the Emperor continues his eternal vigilance. Mighty battlefleets cross the Daemon-infested miasma of the warp, the only route between distant stars, their way lit by the Astronomicon, the psychic manifestation of the Emperor’s will. Vast armies give battle in his name on uncounted worlds, but for all their multitudes, they are barely enough to hold off the ever-present threat from aliens, heretics, mutants, and worse.
To be a man in such times is be one amongst untold billions. It is to live in the cruellest and most bloody regime imaginable.
Yet you are not just any individual — you are a warrior in the fabled Adeptus Astartes, a soldier in the front lines of the Imperium’s never ending war of survival against those that would see it burn. You are one of the Emperor’s Finest: a warrior born from a lost age to face humanity’s greatest enemies in its time of greatest need.