Development

During development, Bohemia Interactive stated at the Electronic Entertainment Expo that ARMA 2 was to have a "roleplaying feel to it", with in-game events affecting the character as well as the entire campaign. For example, terrorizing non-playable characters would result in losing their trust, thus encouraging them to give away valuable information to enemy forces. The entire campaign can be played either offline, as single-player, or online, as cooperative play for up to four players.