This guide attempts to explain how residential zones work in Cities Skylines. Although they are similar to the famous Simcity 4 there are certainly not identical. I will discuss zoning, upgrading your residential buildings and make a comparison between low and high density residential zones.
Cities Skylines features a milestone progression system. Each time you reach a certain population milestone additional gameplay and related buildings, overlay and settings become available. Checkout this guide for an overview table of all milestones! I will also do my best to pass judgement on all unlocks.