Your objective is to shoot the bad guys as accurately as possible. You can aim for the head or the body area. The closer you are to the center of each of these areas the more points you gain. The trick is to make every single shot count.
You got limited time to take out all targets. The white bar indicates how long you have to complete the mission. The red bar shows how long before snipers zero in on your location. Shoot them down before they get you!