Forest Officer Zombies Shooting

The city has been infected with a virus.Almost all the people turned into zombies.The living is low.You are forest officer and Today you have to fight in a difficult battle with zombies. Shoot the zombies before they climbed over the wall.Try to shoot them in the head for one hit shot.After each level you can upgrade your weapon. Controls: Use your mouse to aim and shoot the zombies,press R to reload the gun.