Fortification Upgrades
Level | Name | Price | Multiplier
1 - Camp - 0 - 1,000
2 - Stockade - 40.000 - 1,250
3 - Rabid Pitbulls - 80.000 - 1,500
4 - Walled Town - 160.000 - 1,750
5 - Towers - 320.000 - 2,000
6 - Battlements - 640.000 - 2,250
7 - Portcullis - 1.280.000 - 2,500
8 - Boiling Oil - 2.560.000 - 2,750
9 - Trenches - 5.120.000 - 3,000
10 - Moat - 10.240.000 - 3,250
11 - Drawbridge - 20.480.000 - 3,500
12 - Fortress - 40.960.000 - 3,750
13 - Stronghold - 81.920.000 - 4,000
14 - Palace - 163.840.000 - 4,250
15 - Keep - 327.680.000 - 4,500
16 - Citadel - 655.360.000 - 4,750
17 - Hand of God - 1.310.720.000 - 5,000
Total cost for all fortification upgrades: 2.621.400.000