Cities: Skylines II Save File 100% – 1M+ Population Megacity + All Milestones + All Unlocks
100% complete save file for Cities: Skylines II PC. A sprawling megacity with 1,000,000+ population, all 20 milestones reached, every zoning density and specialization unlocked, a full multi-modal transit network (metro, trains, buses, trams, ferries, and an international airport), all city service buildings and policies unlocked, and a stable, positive city budget.
| Game | Cities: Skylines II |
| Developer | Colossal Order |
| Platform | PC (Steam) |
| Version | Latest (all patches) |
| Completion | 100% — All Milestones + Megacity |
| Population | 1,000,000+ |
| Steam App ID | 949230 |
| Save Path | C:\Users\[Username]\AppData\LocalLow\Colossal Order\Cities Skylines II\Saves\ |
| Save File | [CityName].cok |
| File Size | ~120 MB (ZIP) |
| Last Updated | June 2026 |
Important: Cities: Skylines II save files can be large and are named after your city, not a Steam ID, so there's no renaming step — but disable Steam Cloud before installing, back up your existing saves, and make sure you have enough free disk space, since megacity saves can run well over 100 MB.
C:\Users\[YourUsername]\AppData\LocalLow\Colossal Order\Cities Skylines II\Saves\ (paste into Windows Explorer, or press Win + R and type %appdata%\..\LocalLow\Colossal Order\Cities Skylines II\Saves).cok file into the Saves folder.Save file naming: Cities: Skylines II identifies saves by the city name stored in the .cok file and shown in the Load Game browser, not by any account ID, so the imported city will simply appear as a new save to load. The save contains the full simulation state: all placed roads and buildings, zoning, service coverage, transit lines and vehicles, citizen and business population data, budget/policy settings, and unlocked milestone progression.
Cities: Skylines II is a city-building simulation game developed by Colossal Order and published by Paradox Interactive, released in 2023 as the sequel to the hugely popular original Cities: Skylines. Players design and manage a city from a small starting settlement, zoning residential, commercial, and industrial areas, laying out road networks, and providing public services (power, water, healthcare, education, fire, police) as the population and its needs grow more complex.
The sequel deepens the original's simulation with individual citizen agent tracking (each resident has a job, home, and daily routine simulated economically), more granular building specializations, an overhauled economy system tying resource production to real supply chains, and expanded transit options including a proper metro and improved regional train/air/ferry connections. Progression is gated behind a milestone system: as population and development grow, new milestones unlock additional zoning density tiers, building types, service buildings, and city-wide policies.
City-building sims like this one don't have a traditional 'ending' — 100% completion is generally understood as reaching the final milestone (unlocking everything the base game offers), while building out a large, functional, well-balanced city that handles traffic, budget, and citizen happiness at real scale. A million-plus population megacity with a complete transit network and balanced budget, as included in this save, represents dozens to hundreds of hours of careful planning that would otherwise take a dedicated player weeks of real playtime to build from an empty map.