In the nightmare future of the forty-first millennium, mankind teeters upon the brink of extinction. The galaxy-spanning Imperoim of Man is beset on all siders by ravening aliens, and threatened from within by malevolent creatures and heretic rebels. Only the strength of the Immortal Emperor of Terra stands between humanity and its annihilation. Dedication to His serbife4 are the countless warriors, agents of myriad servants of the Imperious, Foremost amongst them stand the Space Marines, mentally and physically engineered to be the supreme fighting force, the ultimate protectors of Mankind.
Wars rage over airless moons, in the dark, twisted depths of hive worlds and in the cold wastes between stars. From the immaterial realm of warp space, malicious entities send their unspeakable minions to slaughter the Emperor's chosen. Everywhere, soulless specters and slavering monsters are poised to extinguish the life of humanity.
There is no time for peace.
No respite.
No forgiveness.
There is only WAR.