Technology
Branch
Column
Red points
Green points
Blue points
Total points
Unlocks
Reputation
In the tree
Metallurgy tech tree
Column 10
Research cost
Red points
× 90Green points
× 30
What it unlocks
Barricade II
Building
Spiked Barricade II
Building
Fortified Barricade II
Building
Research first
Reinforced Beam
75 red tech points
Leads to
Archers Tower II
100 red and 50 green tech points