Medieval Defense Z is a great online survival game that you can play online and for free. After death took over the desert, you have to start a dangerous journey to reach the castle to survive. In Medieval Defense Z, the challenging Online Medieval Zombie Survival Game, you have to control a moving tower pulled by a donkey and use archers to fight off waves of attacking zombies. Collect money to hire and power-up archers to defend your king and your loyal donkey.