Structures\Resource\Resources

Farm
Built on the plains, farmlands supply food for the whole city. Upgrading a farm will increase its food yield.

Mining Center
Located at the foot of the mountains, the mining center exploits various ore and processes them into useful metals. Upgrading a mining center will increase the metal yield.

Forestry Center
Forestry Centers are responsible for cutting down trees and producing lumber for making airships. Upgrading a forestry center will increase the wood yield.

Refinery
Refineries in the desert can distill precious crystals from the sand stones. Crystals are the core materials for airship engine production. Upgrade a refinery to increase the crystal yield.

Sand Field
Sand Fields are built near a lake or the sea. There is a special kind of sand stone created in the water and used for constructing cultural buildings. Upgrade a sand field to increase the sand stone yield.


Upgrade Requirements

Production Center Level Processing Facility Level Sandstone Cost Population Time
(upgrading to…) 1 1 50 60G 20 5Min
2 2 70 84G 20 6Min 39Sec
3 3 97 117G 599S 20 8Min 50Sec
4 4 137 164G 639S 20 11Min 45Sec
5 5 192 230G 495S 20 15Min 38Sec
6 6 268 322G 694S 20 20Min 48Sec
7 7 376 451G 772S 20 27Min 40Sec
8 8 527 632G 481S 20 36Min 48Sec
9 9 737 885G 473S 20 48Min 57Sec
10 10 1033 1239G 662S 20 1H 5Min 6Sec
12 12 2024 2429G 739S 20 1H 55Min 10Sec
13 13 2834 3401G 634S 20 2H 33Min 10Sec
14 14 3968 4762G 288S 20 3H 23Min 43Sec
15 15 5556 6667G 204S 20 4H 30Min 57Sec
16 16 7778 9334G 85S 20 6H 22Min
17 17 10899 13067G 720S 20 7H 59Min 17Sec

Note: Bolded levels are unreachable without Great Hall Upgrade

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