Gears of War 4 takes place 25 years after the Imulsion countermeasure weapon destroyed the Locust, Lambent and Imulsion on the planet Sera. Unfortunately, this also eliminated the use of fossil fuels, forcing humanity to adapt to new ways of survival.
The countermeasure has also brought the advent of “Windflares” the powerful storms that form throughout the planet. After following the outbreak of Lambent, the reformed Coalition of Ordered Governments estimated that only hundreds of thousands of human beings are left on Sera.
To prevent the declining population, the walled-off cities were built to protect citizens against external dangers. The COG has also declared martial law, preventing any travel outside the city walls. Some human survivors rejected the views of the COG and formed a group called the “Outsiders” who live outside the jurisdiction COG, conducting raids on the COG territory to gather resources.
The game focuses on J.D. Fenix (son of Marcus Fenix and Anya Stroud) alongside his friend Delmont “Del” Walker and Kait Diaz face a new threat to the survival of humanity.