How it works
- The first Defense Tower needs Kitchen Lv. 1, and the Sawmill and Mill both need Defense Tower Lv. 1.
- Every tower costs the same; towers 3 to 8 take half as long again to upgrade as the first two.
- Level 10 needs Town Center Lv. 10.
Overview
Defense Towers launch attacks on enemies that enter their alert zone. The city has eight of them, opened one or two at a time in the early Town Center levels.
Every Defense Tower
| Defense Tower | Builds once you have |
|---|---|
| Defense Tower 1 | Kitchen Lv. 1 |
| Defense Tower 2 | Town Center Lv. 2 |
| Defense Tower 3 | Town Center Lv. 6 |
| Defense Tower 4 | Town Center Lv. 6 |
| Defense Tower 5 | Town Center Lv. 6 |
| Defense Tower 6 | Town Center Lv. 6 |
| Defense Tower 7 | Town Center Lv. 8 |
| Defense Tower 8 | Town Center Lv. 8 |
Upgrade costs
| Level | Wood | Stone | Iron |
|---|---|---|---|
| 1 | 20 | 0 | 0 |
| 2 | 35 | 0 | 0 |
| 3 | 160 | 0 | 0 |
| 4 | 360 | 70 | 0 |
| 5 | 1,500 | 300 | 0 |
| 6 | 3,800 | 765 | 190 |
| 7 | 13,000 | 2,700 | 690 |
| 8 | 25,000 | 5,000 | 1,200 |
| 9 | 52,000 | 10,000 | 2,600 |
| 10 | 92,000 | 18,000 | 4,600 |
Requirements and results
| Level | Requirements | Time (Defense Tower 1 and 2) | Time (Defense Tower 3 to 8) | Power |
|---|---|---|---|---|
| 1 | Kitchen Lv. 1 | 2s | 3s | 60 |
| 2 | Town Center Lv. 2 | 3s | 5s | 114 |
| 3 | Town Center Lv. 3 | 12s | 15s | 195 |
| 4 | Town Center Lv. 4 | 45s | 1m | 303 |
| 5 | Town Center Lv. 5 | 1m | 2m | 465 |
| 6 | Town Center Lv. 6 | 3m | 5m | 708 |
| 7 | Town Center Lv. 7 | 8m | 12m | 1,059 |
| 8 | Town Center Lv. 8 | 14m | 21m | 1,410 |
| 9 | Town Center Lv. 9 | 21m | 30m | 1,761 |
| 10 | Town Center Lv. 10 | 28m | 42m | 2,271 |
About these numbers
Costs, requirements, power and effects come from the game's own files. Times are base build times before construction speed bonuses, and power and effects are the building's totals at each level.