Zombie Army Trilogy is a cooperative third-person shooter video game developed by Rebellion Developments. It combines elements of horror and action, allowing players to battle against hordes of undead soldiers in a World War II setting. The game features a mix of single-player and multiplayer modes, where players can team up to complete missions and defeat powerful bosses. The trilogy includes three games: Zombie Army: Dead War 4, Zombie Army: Dead War 3, and Zombie Army: Dead War 2. Players can choose from various characters, each with unique abilities, and utilize a wide range of weapons to survive the relentless zombie onslaught.