Flanking Tower Achievement in Age of Empires: Castle Siege (iOS)

  • Flanking Tower

     

    10

    Upgrade an Archer Tower to level 5

  • How to unlock Flanking Tower

    Available to upgrade at the 5th age. Requires 14,500 and 16 hours to upgrade. I would recommend burning your other resources before doing this upgrade to make sure that you’re not an easy target. 

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