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.
One man alone against the raving hordes of zombies. They come crawling, running, jumping and all you have to do is load your shotgun and blast them to pieces!
As an experienced sniper, you have successfully managed to penetrate into enemy territory. Now it's up to you to eliminate all of your foes, causing confusion amidst their lines, thus helping your fellow soldiers to survive the enemy threat.