Gears of War: E-Day is an upcoming third-person shooter video game developed by The Coalition and People Can Fly and published by Xbox Game Studios. It is the sixth main installment in the Gears of War series. Set fourteen years before the events of the first game, it takes place during Emergence Day, when the Locust Horde first emerged from beneath the planet Sera and launched a devastating surprise attack against humanity. The story follows young COG veterans Marcus Fenix and Dominic Santiago as they fight to survive the invasion in the city of Kalona alongside fellow soldiers Mags Carter and Lucas Reyes, forming Bravo Squad amid the collapse of civilization. The narrative explores the origins of Marcus and Dom's brotherhood while depicting the fall of Kalona and humanity's first encounters with the Locust Horde.

The gameplay expands upon the series' cover-based combat with redesigned movement mechanics and enhanced traversal options that allow for greater mobility and verticality. The campaign supports four-player online cooperative play and two-player split-screen co-op on consoles, while multiplayer modes include 4v4 competitive matches and a new twelve-player cooperative mode titled Horde Siege.

The game also introduces expanded destruction systems, dynamic environmental damage, and enhanced gore effects, all built using Unreal Engine 5. Development began following The Coalition's transition to Unreal Engine 5, with the studio aiming to recapture the atmosphere, themes, and emotional tone of the original Gears of War, particularly the sense of brotherhood, brutality, and tragedy associated with Emergence Day. The game is scheduled to be released on October 6, 2026, for Windows and Xbox Series X/S.