03-16-2015, 01:29 AM
Cost: 100 per section
Upkeep is 50% higher
Unlocked by Technology: Machinery.
They cost considerably more per segment but also have more hitpoints.
Fortified Walls are 10 high, as opposed to the height of six for normal walls.
Fortified walls can also be built using different themes, such as Atlantean seen here next to default.