Built on over 10 years experience, Arma 2 thrusts you into the heart of the most realistic military simulator ever developed, featuring cutting edge technology, vast, detailed environments defined by real geographic data and authentically modeled units and vehicles. Arma 2: Reinforcements brings to the Armaversum two new factions - British Armed Forces (BAF) and Private Military Company (PMC). Play it separately or combine with original Arma 2: Combined Operations for ultimate military combat experience. Join massive online multiplayer battles with up to 50 players and hundreads of AI units!