$1.99-FREE FOR A LIMITED TIME!! Soldier, your city is in danger! Waves of zombies are coming! They are strong, fast and hungry for brains! It's time to equip your strongest weapon to fight them! Endless zombies are coming, are you going to give up? Tips: - Touch screen and move your finger to shoot arrows. - Drag and drop special attacks. - Increase your Attack to cause more damage to zombies. - Increase Speed to shoot faster. - Power Attack skill could repel zombies. - Critical Hit skill could cause double damage to zombies. - Unlock more weapons as you enter later stages. - Upgrade Wall Defense to increase your life point. - Upgrade Research Center to increase Energy point, which is used to cast special attack.