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There are multiple game modes that the player can choose. One of the modes is coop. In this mode you and several other players try to take objective points from the enemy. When the objective is taken either the next objective opens or you are told to defend objective from counter attack. Isurgency: Sandstorm has not only upped their game in graphic, realistic weapons and bullet dynamics but in the tactics, aggressiveness and lethal accuracy of the artificial intelligence you face. The AI is no joke and must be dealt with using tactics and firepower.