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|---|---|---|---|---|
| Level 1 | Level 2 | Level 3 | Level 4 | Level 5 |
| Fortification Level | HQ Level Required | Fortification Cost (Steel) | Fortification Health (Total) |
|---|---|---|---|
| 1 | 2 | 300 | 10 |
| 2 | 2 | 500 | 15 |
| 3 | 3 | 2,500 | 20 |
| 4 | 3 | 5,000 | 35 |
| 5 | 4 | 15,000 | 50 |
| 6 | 4 | 25,000 | 70 |
| 7 | 5 | 45,000 | 95 |
| 8 | 5 | 60,000 | 120 |
| 9 | 6 | 80,000 | 145 |
| 10 | 6 | 100,000 | 170 |
| 11 | 6 | 120,000 | 195 |
| 12 | 7 | 150,000 | 220 |
| 13 | 7 | 200,000 | 250 |
| 14 | 7 | 250,000 | 280 |
| 15 | 8 | 500,000 | 310 |
| 16 | 8 | 750,000 | 350 |
| 17 | 8 | 1,000,000 | 390 |
| 18 | 9 | 1,500,000 | 430 |
| 19 | 9 | 2,750,000 | 470 |
| 20 | 9 | 4,000,000 | 520 |