It has been a span of 13 days since hordes of zombies launched an invasion on your city, resulting in the loss of the lives of the majority of people. Nevertheless, you are one of the remaining survivors. Strive to persevere and remain alive for the longest possible time, and use a variety of guns to fire at the bloodthirsty attackers. Initially, they will make their way towards you, but be cautious, as soon they will accelerate their speed and come charging after you. Therefore, it is advisable to eliminate them with a headshot.