Technology
Branch
Column
Red points
Green points
Blue points
Total points
Unlocks
Reputation
In the tree
Metallurgy tech tree
Column 15
Research cost
Red points
× 175Blue points
× 20
What it unlocks
Engineering Kit
Smithy II
Supply: Steel Tools
Smithy II
Smithy: Grindstone
Building
Research first
Smithy II
160 red and 20 blue tech points