Arma 2 and it's stand-alone expansion Arma 2: Operation Arrowhead package. * Lifelike combat simulation * Story driven single player * Resource management * RPG elements * Unique AI combat system Built upon over 10 years’ experience, Arma 2 thrusts gamers into the heart of the most realistic military combat simulation ever developed, featuring cutting edge technology, vast, detailed environments and authentically modelled units, weapons and vehicles. Branching, player-driven campaigns offer both solo and cooperative gameplay, accompanied by a huge range of single and multiplayer modes.