Heavy Artillery Factory

"Artillery Batteries use special mortar construction techniques and engineering provided for by this Factory."

- Official BMC description

The Heavy Artillery Factory is a Special Building that is required for the Artillery Battery upgrade. It costs 16,000, takes 48 hours (36 hours on mobile) to build, and gives 700 XP once construction is complete. It consumes 50 and a 1x1 tile space. It requires Level 21 to unlock.