Bunker
The last line below the surface.
What it does
Fortifies defending troops beneath the surface.
When fleets fall, the bunker keeps your ground troops dangerous. Strong for core worlds and contested colonies.
What it enables
Makes key worlds harder to invade and preserves defence under bombardment.
Cost for level 1
Building time depends on the planet’s Robotics Factory and Nanite Factory levels and on the universe speed, so it is not a fixed number.
Cost per level
Each level multiplies the previous cost by ×3, so each further level gets steadily more expensive the further you push it.
| To level | Metal | Crystal | Deuterium |
|---|---|---|---|
| 1 | 200,000 | 100,000 | 50,000 |
| 2 | 600,000 | 300,000 | 150,000 |
| 5 | 16,200,000 | 8,100,000 | 4,050,000 |
| 10 | 3,936,600,000 | 1,968,300,000 | 984,150,000 |
| 15 | 956,593,800,000 | 478,296,900,000 | 239,148,450,000 |
Requirements
None — available from the start, with no research or building gate.
How each race builds it
The four races share the same building rules but not the same hardware — each one names and renders it differently, and applies its own combat multipliers from its race profile.
More buildings
See all buildings or return to the codex index.