The Horus Heresy: Betrayal At Calth PC
The first shots have been fired in the conflict that will change the future of mankind. Brother Legions of Space Marines taking arms against one another. The noble Ultramarines are betrayed on Calth by the zealous Word Bearers bent on tearing down the Imperium. A dark ritual ignites the system's star, sending both Legions underground to battle for their honor, their belief, the fate of the Imperium, or just to survive.