Research upgradeExtra Iron Storage V
+ 100,000 iron storage capacity
Research data
- Research branch
- Iron mine
- Unlock requirement
- Iron mine level 5
- Cost rank
- 19
- Wood cost
- 45,000
- Stone cost
- 45,000
- Food cost
- 45,000
- Gold cost
- 18,000
- Iron cost
- 27,000
- Effect
- + 100,000 iron storage capacity
Related game data
Research branch 1
Research cost 5
