Zombies have filled the whole city, they began to drop in houses and pull out of the refrigerator products. In one of the houses he had a cellar with a huge number of rats that were infected by this dangerous virus and turned into a zombie rats. Fight against them is quite difficult, because to destroy them you need to shoot out of a cannon special projectile. Comes across as hard to protect rats various obstacles that need to get around before the shot. Hit all the zombies and clean the city.