Warhammer 40,000: Core Book

In the grim darkness of the far future, there is only war.

The galaxy writhes in the mailed fist of all-consuming war. The Imperium teeters on the brink of annihilation, beset upon all sides by heretic warlords, daemon-summoning witches, and rapacious alien empires. The Great Rift sunders the void, a ragged wound torn through the heart of the Emperor's realm and bleeding madness and mutation across all.

In every star system and upon every planet, battle rages more fiercely than ever before as loyalists, heretics, and aliens tear reality itself apart in their war