ARMA 2 is set primarily in the fictional Eastern European nation of Chernarus (meaning "Black Rus"). The Chernarussian landscape is based heavily on the Czech Republic; the home country of the developer. ARMA 2, plus all expansions, features eleven distinct armed factions, each with their own vehicles and weapons. Caught in the middle are the Chernarussian and Takistani civilians. The factions included in Arma 2 are: USMC, Armed Forces of the Russian Federation, Chernarussian Defense Forces (CDF), Chernarussian Movement of the Red Star (ChDKZ), National Party (NAPA), and the citizens of Chernarus.
>ARMA 2 features around 80 realistically represented weapons with many variants including assault rifles, machine guns, and missile launchers, with realistically simulated ballistics. There are around 130 vehicle variants, and any vehicle that exists in-game can be controlled by the player, including civilian cars, tractors and bicycles. Similarly, all aircraft encountered in the game can be flown by the player, with limited fuel and realistic weapon loadouts.