Hi Ali Akbar, I really appreciate the viral and horde-forming mechanics in Zombie City. In my opinion, one of the most effect uses for Zombies, I wish more Zombie games would take advantage of the Viral mechanic.
City Builder is looking really nice. Atter viewing the Zombie City, I can definitely imagine putting City Builder to use in developing a Alien Invasion Survival/Crafting Game concept I’ve been stewing over. Keep up the awesome work!