Age of Z is a strategy game available for Android phones and tablets, in which you're on a quest to bring back the civilization after it was stomped out by the zombie infection. Everything starts by rebuilding your city and transform it into a thriving environment to reestablish order. One of the main tasks you'll have to do is to make sure your city has strong defense because you will get attacked quite often by hordes of undead.
Various guns can be used to prevent zombies from getting inside your base, including machine guns, laser cannons, electricity towers, and more. Rebuilding your city is done at a steady pace. You are allowed to set up defenses, rebuild hospitals, homes, farmlands, and so on. The most important asses in this apocalyptic world are healthy humans. You can rescue them as you're looking for resources, and invite them to your city to make it even stronger.
Keep in mind that there are multiple types of zombies because the virus mutates. You will have to fight and kill zombie bears, mutant zombies, death mothers, and so on. Another positive aspect of Age of Z is the ability to create alliances with other players to fight common enemies and take over the world.