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| Level 1 | Level 2 | Level 3 | Level 4 |
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| Level 5 | Level 6 | Level 7 | Level 8-10 |
Summary
- The Iron Storage stores Iron.
- Iron is used to upgrade most higher level buildings.
- Unlike some other real-time strategy games, if this building is destroyed during a battle, the attacker does not necessarily gain some of the Resources in it. The only way Resources can be taken from it is if the attacker destroys the Headquarters.
Upgrade Differences
- Initially, the Iron Storage is a teal-colored iron repository with walls on three sides. The tops of the walls are reinforced.
- At level 2, the Iron Storage gains an arched wooden roof.
- At level 3, the roof is replaced with a metal one.
- At level 4, the roof is rearranged so that it is even with the walls. The walls' reinforcing changes color.
- At level 5, the stone base is replaced with a metal one, and the storage's edging becomes blue.
- At level 6, a short ramp-like structure is added to the front of the storage area.
- At level 7, the arched roof becomes thicker, and now has bolts in it.
- At level 8, the storage gains two metal supports on each side.
Trivia
- Iron is used in every high level upgrade except for the Iron Mine.
- Sometimes, Villagers will carry resources, such as Iron, to a building being upgraded even when Iron was not required for the upgrade.
Statistics
| HQ Level | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number Available | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
Building Size 
|
|---|
| 3x3 |
Level
|
Health
|
Capacity
|
Upgrade Cost | Upgrade Time
|
Instant
|
Headquarters Level Required
|
XP Gain
| ||
|---|---|---|---|---|---|---|---|---|---|
Wood
|
Stone
|
Iron
| |||||||
| 1 | 1,000 | 4,000 | 18,900 | 4,500 | 1,200 | 2h | 110 | 9 | 15 |
| 2 | 1,200 | 8,000 | 21,400 | 5,100 | 1,360 | 2h 45m | 128 | 9 | 17 |
| 3 | 1,400 | 16,000 | 37,000 | 9,400 | 3,040 | 3h 45m | 185 | 10 | 20 |
| 4 | 1,700 | 32,000 | 56,000 | 20,400 | 5,900 | 4h | 245 | 11 | 22 |
| 5 | 2,000 | 64,000 | 93,000 | 43,000 | 11,400 | 6h | 368 | 12 | 26 |
| 6 | 2,400 | 125,000 | 189,000 | 164,000 | 45,000 | 8h | 668 | 14 | 34 |
| 7 | 2,900 | 250,000 | 340,000 | 256,000 | 93,000 | 10h | 942 | 15 | 40 |
| 8 | 3,500 | 500,000 | 490,000 | 440,000 | 193,000 | 12h | 1,282 | 16 | 49 |
| 9 | 4,200 | 1,000,000 | 750,000 | 620,000 | 390,000 | 14h | 1,721 | 17 | 50 |
| 10 | 5,000 | 2,000,000 | 1,110,000 | 1,080,000 | 850,000 | 16h | 2,482 | 19 | 55 |