A cover system is a video game gameplay mechanic that allows a virtual avatar to hide from and avoid dangers, usually in a three-dimensional world. This method is a digital adaptation of the real-life military tactic of taking cover behind obstacles, for purposes of attaining protection from enemy ranged or area effect attacks, such as gunfire or explosions.

Gears of War 2 is a third-person shooter video game developed by Epic Games and published by Microsoft Game Studios for the Xbox 360. It is the second installment of the Gears of War series, with lead design by Cliff Bleszinski. The game was released in North America, Europe and Australia on November 7, 2008, and was released in Japan on July 30, 2009. The game expands technically on the previous game by using a modified Unreal Engine 3. The development team brought in comic book writer Joshua Ortega to help write the plot for the game.