Fortification is a defense mechanism that unlocks at City Center Level 5. After fortify process, certain buildings gets surrounded by spikes that reduces all damage done to the Fortified build. There are 4 levels of Fortification and each level reduces the damage received by a percentage.

You can only Fortify you Defensive Towers, your City Center and your Stock Piles.


Damage Reduction values and required City Center level.

Level Damage reduction Required City Center level
1 20% 5


3 40% 7
4 50% 8

Archer's Tower

Bombard Tower

Burning Mirrors

Beast Cannon

Flamer Tower

Gatling Arrow Tower

Sky Tower

Stock Pile

City Center

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