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Tier 4 City Upgrades

Bit City Walkthrough and Guide by Private
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Tier 4 City Upgrades

Last Updated:
tier 5

Emissions tax
Car coin bonus increased by 300%
Further increases the car coin bonus

Rooftop Solar
Building earning increased by 500%
Increases earnings of all buildings by 500%

Building codes
+2 lvl increase each construction
Increases buildings to jump up two levels instead of one when upgrading the Building / lot.

Airline Fees
Each plane earning extra 150k/sec
Same with the cars version but this time with planes. Allows each plane to generate specified amount when active on the map.

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