Heavy defensive structures made from titanium alloy with augmentations to improve durability. This configuration can absorb great damage to retard the enemy's advance.
| Level | Build (Lvl 1) / Upgrade Cost | Hitpoints | Command Center Level Required |
|---|---|---|---|
| 1 | 120 minerals | 900 | 2 |
| 2 | 600 minerals | 1 500 | 2 |
| 3 | 3 000 minerals | 2 100 | 3 |
| 4 | 6 000 minerals | 2 700 | 4 |
| 5 | 18 000 minerals | 4 200 | 5 |
| 6 | 45 000 minerals | 6 000 | 6 |
| 7 | 120 000 minerals | 7 500 | 7 |
| 8 | 300 000 minerals | 9 000 | 8 |
| 9 | 600 000 minerals / 600 000 uranium | 12 000 | 9 |
| 10 | 1 800 000 minerals / 1 800 000 uranium | 16 500 | 9 |
| 11 | 2 400 000 minerals / 2 400 000 uranium | 21 000 | 10 |
