Against the Storm · Citadel upgrade
Brass Forge 03: Mine Upgrades
This Brass Forge tier increases global production speed and unlocks Mine Upgrades.
How it works
The level 6 row lists Brass Forge 03 with +6% Global Production Speed and “Mine Upgrades unlocked.” The source records the unlock but does not describe the Mine Upgrades system, its available choices, or their effects. This tier belongs to the Brass Forge branch, which also grants global production-speed bonuses at other levels.
Read the supporting references
Check the edition and source version for patch-specific details. Guide methodology.