(known in Spanish as Ejército de Dos ) is a third-person shooter video game series developed by EA Montreal and Visceral Games, published by Electronic Arts. The franchise is defined by its deep focus on cooperative gameplay , requiring two players (or one player and an AI partner) to use coordinated tactics to progress. Core Series Titles

: The final entry in the series, it moved the setting to Mexico and introduced two new operatives, Alpha and Bravo , fighting against a ruthless drug cartel. Key Gameplay Mechanics

: Introduced protagonists Tyson Rios and Elliot Salem , two ex-Army Rangers turned private military contractors. It established the "Aggro" mechanic, where one player draws enemy fire while the other performs flanking maneuvers.

The franchise consists of three main installments released between 2008 and 2013: