In this thrilling Battlestar Galactica and Gears of War crossover, the survivors of the Twelve Colonies, led by the resolute Admiral Helena Cain aboard the Pegasus, find themselves fighting not only the ever-present threat of the Cylons but also an even darker, more enigmatic force. When Cain orders a desperate, random FTL jump, the crew of the Pegasus emerges not in a Cylon stronghold, but on a war-torn planet-Sera. The planet is ravaged by its own war, plagued by the monstrous Locust Horde and a looming enemy known only as the Architect.
As Cain and her crew struggle to survive in this foreign battlefield, they discover that the Architect's mechanized army, far more advanced and ruthless than any Cylon threat, has begun to merge with the very fabric of Sera. On the ground, Marcus Fenix and his squad of COG soldiers fight tooth and nail against the Locust while also facing the terrifying influence of the Architect. With an energy field that blocks their every move and a towering, near-invincible warlord leading the charge, the COG soldiers are pushed to the brink.
With time running out, the Pegasus crew and the COG soldiers must form an uneasy alliance to take down the Architect's insidious control over Sera and the galaxy. In a series of heart-pounding battles both in space and on the planet's ravaged surface, Cain leads a final assault on the Architect's warship while Marcus and his team navigate the chaos below to dismantle the source of its power. The stakes are higher than ever as both humanity's fight for survival and the fate of Sera hang in the balance. Will they win, or will the Architect's terrifying empire crush them all?
This crossover story blends the grim intensity of Battlestar Galactica's struggle for humanity's survival with the brutal, unrelenting combat of Gears of War, bringing together iconic characters and epic warfare in a universe on the brink of extinction.