Developer types are the different categories of RCI buildings in a city, there are 12 developer types: * Residential * Low-wealth Residential (R-§) * Mid-wealth Residential (R-§§) * High-wealth Residential (R-§§§) * Commercial * Low-wealth Commercial Services (CS-§) * Mid-wealth Commercial Services (CS-§§) * High-wealth Commercial Services (CS-§§§) * Mid-wealth Commercial Office (CO-§§) * High-wealth Commercial Office (CO-§§§) * Industrial * Agriculture (I-Ag) * Dirty (I-D) * Manufacturing (I-M) * High-tech (I-HT)