The story of Gears of War 3 takes place after a devastating attack by the Locust Horde, which has left humanity on the brink of collapse. The game follows Marcus Fenix and his allies as they embark on a perilous journey to stop the enemy's plans and find a way to restore peace to the world.
The gameplay in Gears of War 3 is intense and fast-paced, with an emphasis on cover-based third-person shooter combat. Players control Marcus Fenix and his squad as they battle against hordes of Locust soldiers, using a variety of guns and abilities to take them down. The game also features a new co-op multiplayer mode, allowing players to team up with friends to complete objectives and take down enemies.