開發者日誌（英文：Developer diaries）是由Colossal Order官方製作，詳細介紹當前開發內容及遊戲設計的文章，有時也會伴隨視頻日誌同時公佈。
日誌均發佈在都市天際線2的Paradox 論壇頁面。
基礎遊戲
下表為《都市：天際線2》基礎遊戲與補丁的所有開發者日誌。
外部連結：Cities Skylines II features (Paradox Interactive)
| 編號 | 標題與連結 | 簡介 | 發佈日期 |
|---|---|---|---|
| 01 | Feature #1: Road ToolsParadox / CS2 Forum | Building roads is more flexible than before, helping you realize your vision for the perfect road layout. You will find a variety of new and returning options! | 2023-06-19 |
| 02 | Feature #2: Traffic AIParadox / CS2 Forum | Managing traffic in a growing city was a core part of Cities: Skylines, and for the sequel we wanted to bring you a more advanced system to make the city feel more realistic and alive. | 2023-06-26 |
| 03 | Feature #3: Public & Cargo TransportationParadox / CS2 Forum | An integral part of a city’s inner workings is public transportation. Expand as the city grows from buses and taxis to other transportation systems such as tram and subway networks. | 2023-07-03 |
| 04 | Feature #4: Zones & Signature BuildingsParadox / CS2 Forum | Various zone types create the bulk of the city: sprawling suburban areas and apartment building blocks, busy commercial districts, noisy industrial parks and sleek high-rise office complexes. | 2023-07-10 |
| 05 | Feature #5: City ServicesParadox / CS2 Forum | Brand-new services join the familiar city services, and while basic functionality remains the same, they have more nuanced and complex mechanics befitting a more realistic city-building game. | 2023-07-17 |
| 06 | Feature #6: Electricity & WaterParadox / CS2 Forum | Electricity and water are crucial for running a city. A lack of electricity or water leads to reduced Well-being, while backed-up sewage takes a toll on citizen Health. | 2023-07-24 |
| 07 | Feature #7: Maps & ThemesParadox / CS2 Forum | A brief comparison of map sizes: A map tile in Cities: Skylines II is smaller than its predecessor - but you are able to unlock almost all tiles, giving you a whopping total of 441 map tiles. | 2023-07-31 |
| 08 | Feature #8: Climate & SeasonsParadox / CS2 Forum | In Cities: Skylines II we have a whole new feature in the form of Climates! It brings changing seasons to the game and makes each map a unique gaming experience with its own Climate. | 2023-08-07 |
| 09 | Feature #9: Economy & ProductionParadox / CS2 Forum | A closer look at the economic simulation, how citizens and companies manage and use resources, and how you can build a prosperous city. | 2023-08-14 |
| 10 | Feature #10: Game ProgressionParadox / CS2 Forum | Game progression has two interconnected layers: Milestones that give you points to spend in your Development Trees, allowing you to unlock more advanced services. | 2023-08-21 |
| 11 | Feature #11: Citizen Simulation & LifepathParadox / CS2 Forum | Each citizen has their own Lifepath. They either move into the city or are born there. If they are happy, they will stay in the city and eventually grow old and die of old age. | 2023-08-28 |
| 12 | Feature #12: Sound & MusicParadox / CS2 Forum | City Service building sounds, atmospheric sounds and the sound of traffic - all these elements have been expanded to give more depth, variety, and control. | 2023-09-04 |
| 13 | Feature #13: Cinematic Camera & Photo ModeParadox / CS2 Forum | A deep dive into our new Camera & Photo Mode tools where you truly can put your city into its best light, and share your creations with others. | 2023-09-11 |
| 14 | Behind the Scenes #1: ModdingCS2 Forum | We’re going to talk about modding in Cities: Skylines II. While modding isn’t supported at release, we want to share what modding means to us and how we approach modding support, so you know what to expect. | 2023-10-17 |
| 15 | Behind the Scenes #2: EditorCS2 Forum | From the start, we knew we wanted to include an in-depth editor powerful enough to bring your ideas to life. This time around we have a good sense of what modders and creators may need. | 2023-10-18 |
| 16 | Behind the Scenes #3: Game BalancingCS2 Forum | A peek behind the curtain as we discuss our guiding principles and challenges in balancing Cities: Skylines II. Striking the right balance is always a challenge, but reaching a good balance for the various features is an important part of how the game plays and feels. | 2023-10-19 |
| 17 | Introduction to Paradox ModsCS2 Forum | Paradox Mods is our own platform-neutral modding system. Paradox’s considered opinion is that mods are, and should always be, free of charge community-created content. This is not something that we will ever change. | 2023-10-19 |
| 18 | Behind the Scenes #4: Companies and BillboardsCS2 Forum | We have given companies and their billboards a significant upgrade from the original Cities: Skylines. Companies now play a role in the game mechanics, and billboards represent the companies that reside in the buildings. | 2023-10-20 |
| 19 | Behind the Scenes #5: Citizen CharactersCS2 Forum | We wanted our citizens to have much more variation to create a more inclusive and realistic gaming world. It was essential to us that the characters in Cities: Skylines II represent a broad spectrum of humanity, including different ethnicities and body types. | 2023-10-21 |
| 20 | Behind the Scenes #6: Tutorials and AdvisorCS2 Forum | Our goal with the tutorials in Cities: Skylines II is to provide you with a thorough introduction to the game and guide you toward building a successful city. | 2023-10-22 |
| 21 | CO Word of the Week #1CS2 Forum | CO Word of the Week history, CSII release, optimizing, patches, bugs. | 2023-11-01 |
| 22 | CO Word of the Week #2CS2 Forum | Community kindness, garbage collection bug, stray dogs, DLCs, quality-of-life improvements, CO CEO pledge. | 2023-11-06 |
| 23 | CO Word of the Week #3CS2 Forum | Editor, console update, patch releases will slow. | 2023-11-13 |
| 24 | CO Word of the Week #4CS2 Forum | Priorities: Performance improvements, Bug fixing, Editor/Modding support. Mail Service. Citizens』 ability to reserve housing. Export and distribution. Console release and DLC content. Patch highlights. | 2023-11-20 |
| 25 | CO Word of the Week #5CS2 Forum | Modding, priority updates | 2023-11-27 |
| 26 | CO Word of the Week #6CS2 Forum | Cities Skylines II performance standard and polish we are aiming for. Community. Bug fixes. Last patch of the year is coming out next week. Airports having problems. We have received reports of more stray dogs. | 2023-12-04 |
| 27 | CO Word of the Week #7CS2 Forum | Last patch of the year coming soon. Two new maps. Modding, Consoles, Expansion Pass, Performance and bug fixing, Your suggestions/feedback. | 2023-12-11 |
| 28 | CO Word of the Week #8CS2 Forum | Holiday break over. The Editor UI is expected to be ready enough for the closed beta in a few weeks. Bug fixing patch. Toxicity in the community. | 2024-01-15 |
| 29 | CO Word of the Week #9CS2 Forum | Paradox Mods, modding support priorities. Work on the console versions is ongoing. Beach Properties content is almost ready. Patch 1.0.19. | 2024-01-22 |
| 30 | CO Word of the Week #10CS2 Forum | Patching process and upcoming patch. Pausing "CO Word of the Week". | 2024-01-29 |
| 31 | CO Word of the Week #11CS2 Forum | Answering questions about goods instead of pausing the "CO Word of the Week", due to popular demand. | 2024-02-05 |
| 32 | CO Word of the Week #12CS2 Forum | FAQs about the economy | 2024-02-12 |
| 33 | CO Word of the Week #13CS2 Forum | FAQs about citizens, education, and public transport | 2024-02-19 |
| 34 | CO Word of the Week #14CS2 Forum | FAQs which address the feedback process with the community & what can be expected. | 2024-02-26 |
| 35 | CO Word of the Week #15CS2 Forum | The status of the modding support. Preparing for the public release with support for Code Modding and the Map Editor. Need more time to make importing the assets work. | 2024-03-11 |
| 36 | Beach Properties Asset Pack & Modding Wavelet Patch AnnouncementParadox / CS2 Forum | Beach Properties Asset Pack and Deluxe Relax Station Music Pack release date. Updated Road Map. Modding. Updates and fixes. | 2024-03-18 |
| 37 | Dev Diary #1: Paradox Mods in Cities: Skylines IICS2 Forum | What will the new place to download content for Cities: Skylines II look like? We've asked the team behind Paradox Mods to give the community a tour! The first Dev Diary goes over what the experience will be for both users and creators! | 2024-03-19 |
| 38 | Dev Diary #2: Map EditorCS2 Forum | How to use the new Map Editor that will be available in Beta on the 25th of March. | 2024-03-20 |
| 39 | Dev Diary #3: Code ModdingCS2 Forum | Sergey (aka MacSergey) explains how code modding for CSII works. The Code Mod Tools will be released on the 25th of March. | 2024-03-21 |
| 40 | Beach Properties Dev Diary #1: Creating an Asset PackParadox / CS2 Forum | In this first installment, we’ll talk about what an asset pack is and how we approached the development of Beach Properties alongside the development of the game. | 2024-03-26 |
| 41 | Beach Properties Dev Diary #2: Sunshine & Swimming PoolsParadox | Today we cover the references and inspiration for the buildings and the two approaches we took for the North American and European themes. | 2024-03-27 |
| 42 | Economy 2.0 Dev Diary #1Paradox / CS2 Forum | This time we look at the economy re-work or as we like to call it 「Economy 2.0」 set to release within the upcoming two weeks. | 2024-06-03 |
| 43 | Economy 2.0 Dev Diary #2Paradox / CS2 Forum | A few important changes not directly related to the economy and we’ll go over what you can expect when loading up your existing cities. Free stuff. | 2024-06-10 |
| 44 | Tile Upkeep ExplainedParadox / CS2 Forum | Many of you had questions on how the Tile Upkeep added in patch 1.1.5f1 works. Here's a dev diary we hope will help you understand why it was added and how it works. | 2024-06-28 |
| 45 | Decorations PatchCS2 Forum | We’re back with a development diary as patch 1.1.8, also known as Decorations Patch, is almost ready for you. | 2024-09-03 |
| 46 | Region Packs from a Content Creator Manager’s PerspectiveCS2 Forum | pdx_Peanut (aka BadPeanut) discusses the development of the Region Packs. | 2024-10-24 |