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Hardened Bunker
Last-resort shelter
Hardened Bunkers protect personnel, resources, and command functions during heavy attacks.
Theatre max level: 10
Unlock requirements
- Command HQ level 10+
- Perimeter Wall level 10+
Blast-resistant shelter: defence bonus and raid loot protection for warehouse stocks.
Upgrade cost & build time (before world speed)
Build times match the balance formulas. World speed accelerates resource production only, not construction calendar time.
- To Lv1: 36m 0s · C216 M1728 F216
- To Lv2: 42m 0s · C276 M2212 F277
- To Lv5: 1h 7m · C580 M4638 F580
- To Lv10: 2h 28m · C1992 M15938 F1992
Raid shelter
In addition to defence strength, each bunker level shelters a larger share of warehouse capacity from successful raids.
| Bunker level | Sheltered from raids |
|---|---|
| Lv0 | 20% of storage capacity sheltered |
| Lv1 | 25% of storage capacity sheltered |
| Lv2 | 30% of storage capacity sheltered |
| Lv3 | 35% of storage capacity sheltered |
| Lv4 | 40% of storage capacity sheltered |
| Lv5 | 45% of storage capacity sheltered |
| Lv6 | 50% of storage capacity sheltered |
| Lv7 | 55.00000000000001% of storage capacity sheltered |
| Lv8 | 60% of storage capacity sheltered |
| Lv9 | 65% of storage capacity sheltered |
| Lv10 | 70% of storage capacity sheltered |
Sheltered capacity is subtracted from holdings before loot is calculated. A successful raid can still take at most 80% of combined warehouse capacity per engagement, limited by surviving convoy cargo.