Hub Upgrade 1:
- 10 Iron Rods
Hub Upgrade 2:
To unlock Hub Upgrade 2 you will need the following:
- 20 Iron Rods &
- 10 Iron Plates
Hub Upgrade 3:
To unlock Hub Upgrade 3 you will need the following:
- 20 Iron Plates,
- 20 Iron Rods &
- 20 Copper Wire
Hub Upgrade 4:
To unlock Hub Upgrade 4 you will need the following:
- 75 Iron Plates,
- 20 Cable &
- 10 Concrete
Hub Upgrade 5:
To unlock Hub Upgrade 5 you will need the following:
- 75 Iron Rods,
- 50 Cable &
- 20 Concrete
Hub Upgrade 6:
To unlock Hub Upgrade 6 you will need the following:
- 100 Iron Rods,
- 100 Iron Plates,
- 100 Copper Wire &
- 50 Concrete