Arma 2 is a military simulation video game developed by Bohemia Interactive and released in 2009. It is set in a fictional post-Soviet state called Chernarus, where players engage in realistic combat scenarios. The game features a large open world, allowing for both single-player and multiplayer experiences, and emphasizes tactical gameplay and teamwork. The game includes various modes, such as campaign missions and user-generated content through the Arma modding community. Players can control different military units, vehicles, and aircraft, enhancing the immersive experience. Arma 2 is known for its detailed graphics and complex mechanics, appealing to fans of military simulations.