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Artillery towers

Strategically placed artillery towers can make all the difference in X-Morph: Defense. Their long range makes them ideal for covering multiple enemy attack paths. They can also lob shells over buildings or other terrain obstacles. Artillery shells deal splash damage so they can destroy multiple small ground units with a single shot. However, they can not fire at airborne enemies or at units that are too close to them.

https://youtu.be/fysixC0P48U