Castle Defense Online is a free-to-play action game. You must defend the castle by shooting the oncoming enemy before they reach the end of the Castle or they will destroy it Earn stars and buy power ups and upgrades to kill the most powerful enemies and upgrade your weapons to conquest the castle wars. Play Castle Defense Online online, both on a mobile device (iOS/Android), and a desktop computer (PC/Mac). No download or installation required. Just click and play!
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