ARMA 2

ARMA 2 is a tactical shooter focused primarily on infantry combat, but significant vehicular and aerial combat elements are present. The player is able to command AI squad members which adds a real-time strategy element to the game.ARMA 2 is set primarily in the fictional Eastern European nation of Chernarus. The Chernarussian landscape is based heavily on the Czech Republic; the home country of the developer.(wikipedia.org)