Cities: Skylines II progression combines Milestones and service Development Trees. Milestones advance through Expansion Points earned passively from population and happiness changes and actively through city actions; their rewards include Development Points and access to services, policies, management options, and zone types. Development Points unlock additional options within trees, whose tiers and branches can require earlier nodes. This reference describes selected reported unlocks: mail sorting, parks, transport connections, college, parking, recycling, and water treatment. The sources also describe how the choices connect to city needs and operating costs. Exact node costs and a complete tree inventory are not provided here.
10 guidesIceflake Studios, Colossal OrderPC edition · Oct 24, 2023
A source-bounded reference to Cities: Skylines II milestones, development-tree structure, and selected service, transport, education, parks, and communications unlocks. Records describe reported functions and constraints; they are not effectiveness rankings or a complete guide to the trees.
The progression records use Paradox's official feature passage for system structure and Shacknews for named early development options; IGN is used for the general service-upkeep pitfall.
No complete Development Tree inventory, exact Development Point costs, quantified effects, or comparative effectiveness data is present in these source passages.
The separate Wikipedia passage covers the original Cities: Skylines and its DLC, not this sequel's progression records, and has been excluded from topic evidence.
Explanations prepared with GPT-6 Luna and checked against the linked references. These are source-reviewed guides. They do not establish independently tested optimal builds or exact upgrade budgets. How coverage works.
