Arma 2: Operation Arrowhead (Arma 2: OA; stylized as ARMA II: Operation Arrowhead) is a standalone expansion pack to Bohemia Interactive's tactical shooter Arma 2. Arma 2: Operation Arrowhead includes three new multiplayer maps new vehicles and equipment new factions along with a new campaign. The game has sold 3.5 million copies as of February 2015. In Arma 2: Operation Arrowhead the player can assume the role of various military duties from simple infantry man or a special forces operative to tank commander or pilot of a combat helicopter. Also in some scenarios the users are allowed to command units like a real-time strategy game. Players are allowed to perform duties that real soldiers would perform during combat. In addition to campaigns players are allowed to play mini-missions and participate in a simulated training program.