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.
Well the game is not very noob friendly and quite boring, if you aren't a hardcore military sim enthusiast. You spend a lot of time just walking and then get sniped by some veteran players who know some good places on the map to hide and shoot, then you repeat the process again.