Description: Troops rely on a bunker when the going gets tough. Upgrading this defensive structure increases its capacity and defense.


Level Resource Cost Upgrade Time Soldier Slots
Metal Oil
1 50,000 45,000 10m 6
2 200,000 180,000 10h 9
3 800,000 720,000 20h 12
4 3,200,000 2,880,000 1d 16h 15
5 18

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