Zombie X City Apocalipse

The apocalypse has already arrived. Apparently a virus has attacked humanity, many of your friends and acquaintances in the city, are now infected and have become fearsome zombies. You are one of the survivors and your duty is to end them to return to the perfect world that once was. This mission is going to be very complicated, apparently the zombies are protecting a much bigger beast, to get to it you will have to finish with its protectors. There are rumors that there are more cities with survivors, you will have to go through them and find as many people as you can. It seems that this disease also attacks dogs so, you may encounter some along the way. Remember that to kill them you must shoot them in the head. For each completed mission you will receive a bonus so that you can improve your weapons and get a protection team. Save humanity and stay alive!