Keep your eye on the target, don't let to move around neither one of terrorists. shoot all terrorists which are creeping around, by using sniper and your steady hand. zoom in for those head shots.
Terrorists have been spotted at the train yard. you are an elite special-forces soldier that has been sent to eliminate them. ready your assault rifle and shoot the enemies as they come out from their hiding places. fight across 4 levels and test your sharpshooting skills by unlocking all 10 achievements.