The Battlefield series is widely known for being realistic, intense, and hardcore. Every single aspect of the game is impressively real, even down to how bullets behave when shot. Sniping is one of the most challenging aspects of the game due to the behavior of bullets. When shot, a bullet encounters air resistance and gravity, giving it a downward flight pattern. The air resists its forward motion, giving it a negative acceleration in the x direction, while gravity give the bullet a positive acceleration downward. This is commonly known as "bullet drop", so one must raise the cross hairs above the target depending on how far away it is to account for it. Binoculars can be used to measure the distance, and sights can be adjusted accordingly as well. The implementation of physics into war simulators makes an already realistic and hardcore game that much more intense.