Developer diaries

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Cities: Skylines
DLC icon Plazas and Promenades.png Plazas and Promenades
1.151.15.1
DLC icon airports.png Airports
1.141.14.1
DLC icon sunset harbor.png Sunset Harbor
1.131.13.11.13.21.13.3
DLC icon campus.png Campus
1.121.12.11.12.21.12.3
DLC icon industries.png Industries
1.111.11.1
DLC icon parklife.png Parklife
DLC icon green cities.png Green Cities
1.91.9.11.9.21.9.3
DLC icon mass transit.png Mass Transit
1.8
1.71.7.11.7.2
DLC icon natural disasters.png Natural Disasters
1.61.6.11.6.21.6.3
DLC icon snowfall.png Snowfall
1.5
1.41.4.1
1.31.3.11.3.2
DLC icon after dark.png After Dark
1.21.2.11.2.2
DLC icon deluxe edition.png Base version
1.11.1.1
1.01.0.61.0.71.0.7c

Developer diaries are articles, usually accompanied by screenshots and videos, showing the momentary state of development, describing features and explaining game design choices.

They are published more or less regularly by the developers Colossal Order in the game's main forum.

Plazas and Promenades[edit | edit source]

All developer diaries about the Plazas and Promenades expansion pack as well as patch 1.15, 1.15.X and 1.16.

No. Title and Link Description Date
0 Plazas and Promenades Announcement "Plazas and Promenades" announcement. Plazas and Promenades introduces Pedestrian Zones, Specialized Districts and Service Buildings. 2022-08-22
1 Plazas and Promenades Dev Diary #1: Pedestrian Areas Creating Pedestrian Areas, Service points, Pedestrian Streets, Bollards. 2022-08-26
2 Plazas and Promenades Dev Diary #2: Management and Progression Service Points, Pedestrian Area Panel, Progression and Focus, Unique Buildings, Area Policies. 2022-08-29
3 Plazas and Promenades Dev Diary #3: New Plazas and Service Buildings New Plazas, Props, Decals, and Service Buildings. 2022-09-02
4 Plazas and Promenades Dev Diary #4: New Specializations and Maps Three Wall-to-wall specializations for residential, commercial, and office zones. Each features 48 new modern low-rise buildings. Five new maps. 2022-09-07
5 Plazas and Promenades Dev Diary #5: Free Content and Patch Notes Quit After Saving, new roads, one-way metro tracks, patch notes for 1.15.0-f5. 2022-09-13
MCM CCP: Mid-Century Modern by REV0 "Mid-Century Modern" Content Creator Pack Dev Diary. REV0 describes the process of creating this pack. 2022-09-03
RV Roads & Vehicles Dev Diary: Free Content & Patch Notes "Roads & Vehicles" free content. Eight new buses for base game, 12 new trams for Snowfall, and 25 new roads tied to After Dark, Snowfall, and Plazas & Promenades expanding the options for roads with bicycle lanes, trams, and pedestrian streets. Patch notes for 1.15.1-f4. 2022-11-09
SKY Content Creator Pack: Creator Dev Diary - Skyscrapers "Skyscrapers" Content Creator Pack Dev Diary. Feindbold describes the process of creating this pack. 2022-11-15
HOK Content Creator Pack: Creator Dev Diary - Heart of Korea "Heart of Korea" Content Creator Pack Dev Diary. ELVIS describes the process of creating this pack. 2022-11-21
FD 1 Financial Districts Dev Diary #1: Stock Exchange & Investments The Stock Exchange, International Trade Building, Investments, Banks, Financial Offices specialization, new maps. 2022-12-02
FD 2 Financial Districts Dev Diary #2: Free Update & Patch Notes Color Corrections. New pets. Selecting submesh variation for ploppable buildings. Patch notes. 2022-12-12
MP2 Content Creator Pack: Creator Dev Diary - Map Pack 2 CCP: Map Pack 2. Sidai describes the process of creating this pack. Research, Planning, Production Process. 2023-01-14

Airports[edit | edit source]

All developer diaries about the Airports expansion pack as well as patch 1.14 and 1.14.X.

No. Title and Link Description Date
0 Airports DLC Airports DLC announcement. Experience the wonders and logistics of modern-day air travel. Coming 25 January 2022. 2021-12-10
1 Modular Airport Buildings Design your own airport and grow it from a small local transit point to a massive international hub buzzing with life. 2022-01-12
2 Airport Progression & Public Transport Links Start with a basic connection to the outside world with an aim to have your very own airline headquarters. 2022-01-14
3 City Airline Welcome aboard this dev diary headed for the creation of your very own city airline. 2022-01-17
4 Cargo Airport & New Maps "But what about all those packages and cargo deliveries", I hear you ask? 2022-01-20
5 Free Update & Patch Notes Improvements to Plane AI, Replace trees on roads, Buy or sell soil​, Service Vehicle Selection​, Patch notes for 1.14.0-f4. 2022-01-24
6 How to build an airport We explore step by step how to build an airport using the Cities: Skylines - Airports expansion! 2022-01-25

Sunset Harbor[edit | edit source]

All developer diaries about the Sunset Harbor expansion as well as patches 1.13 and 1.13.X.

No. Title and Link Description Date
0 Sunset Harbor - Official Announcement Trailer Announcement trailer and schedule for upcoming Dev Diaries. 2020-03-19
1 Sunset Harbor Dev Diary #1: Fishing Industry Introduction, Fishing Industry production chain, Info View, Fishing Harbor and routes, Fish Farms, markets and factories, profit. 2020-03-20
2A Sunset Harbor Dev Diary #2A: Trolleybuses Trolleybuses, depots, roads. Math. 2020-03-21
2B Sunset Harbor Dev Diary #2B: New Public Transport Intercity Bus Service, Passenger Helicopter, Transport Hubs. 2020-03-22
3 Sunset Harbor Dev Diary #3: Waste and Water Improvements Waste Transfer System, Waste processing chain differences, Waste Processing Complex, Waste Transfer Facility. Inland Water Treatment, Inland Water Treatment Plant, Eco Inland Water Treatment Plant, Advanced Inland Water Treatment Plant, Eco Advanced Inland Water Treatment Plant. 2020-03-23
4 Sunset Harbor Dev Diary #4: Maps, Policies and Unique Building Five new maps. Six new policies. New Unique Building "Aviation Club". 2020-03-24
5 Sunset Harbor Dev Diary #5: Free Update Overground Metro. New Healthcare City Services, Eldercare and Child Health Center. Improvements, Tutorial Message Log, start in a paused state, camera position can also now be saved when saving the game. Placing buildings on curved roads and slopes made simpler. Building pedestrian paths is easier. Walkable quays. 2020-03-25
TS Content Creator Pack - Train Stations by Bad Peanut: Dev Diary A bit about BadPeanut, what’s Included in the CCP, and the process of making this pack. 2021-05-22

Campus[edit | edit source]

All developer diaries about the Campus expansion as well as patches 1.12 and 1.12.X.

No. Title and Link Description Date
0 Campus Dev Diary Introduction The Campus expansion has three types of schools for higher learning, the Trade School, Liberal Arts College and University. It also includes varsity sports and museums. 2019-05-09
1 Campus Dev Diary #1: Campus Areas Creating a Campus Area. Campus Types. Campus Area Info View. Campus Budget. Campus Areas and Your City. 2019-05-10
2 Campus Dev Diary #2: Campus Reputation Increasing reputation. Bonuses from increasing campus reputation. Academic Works. Museums. Exchange Students. 2019-05-13
3 Campus Dev Diary #3: Academic Year, Events, and Faculties Academic Year. Academic Year Report. School events. Unique Faculties. 2019-05-14
4 Campus Dev Diary #4: Varsity Sports Varsity sports arenas. Varsity team customization. Varsity sports matches. Trophies. Varsity sports policies. Coaching staff and cheerleaders. 2019-05-15
5 Campus Dev Diary #5: Maps and Policies Five new maps. New policies. 2019-05-16
6 Campus Dev Diary #6: Free Update Libraries (service buildings and one Unique Building). Bus line customization. School Bus. Citizen employment details. Industry 4.0. Education system update. Fire behavior update. 2019-05-17

Industries[edit | edit source]

All developer diaries about the Industries expansion as well as patches 1.11 and 1.11.X.

No. Title and Link Description Date
1 Industries Dev Diary #1 Introduction to the Industries DLC. 2018-10-11
2 Industries Dev Diary #2: Industry Areas Creating your Industry Area, Types of Industry Areas, Industry Area Info view and Industry Areas Overview, Benefit of having Industry Areas in your city. 2018-10-12
3 Industries Dev Diary #3: Supply chain part 1 Extractor Buildings, Raw Material Storage Buildings, Processing Buildings, Unique Factories, Auxiliary Buildings. 2018-10-15
4 Industries Dev Diary #4: Supply chain part 2 Industry Area Info Panel, Resource types, Unique Factories. 2018-10-16
5 Industries Dev Diary #5: Industry Area levelling Main Buildings, Industry Area levelling, Leveling Requirements, Leveling with benefits. 2018-10-17
6 Industries Dev Diary #6: Maps and policies Five new maps, 3 new City-wide Policies and 3 new Industry Policies, New models and props. 2018-10-18
7 Industries Dev Diary #7: Cargo Cargo Services, Warehouses, Cargo Airport, Cargo Airport Hub, Post Office City Service, Post Office, Post Sorting Facility. 2018-10-19
8 Industries Dev Diary #8: Free Update Toll Booths, Make Building Historical, Modding: Custom random names, Asset Editor. 2018-10-22
9 CO word of the week #4 - 48/2018: After Industries release! Reddit AMA, release party, bug reports and fixing, feedback, Christmas songs, Chirper hat. 2018-11-26
10 Holiday Dev Diary Part 1 - Surprise Patch Included! Patch 1.11.1-f2, new Christmas songs, Chirper hat, winter maps, "Winter Market" Unique Building. 2018-12-13
11 Holiday Dev Diary Part 2 - Show Me the Music! Making three new Christmas songs to add to 2017's "Carols, Candles and Candy" free DLC. 2018-12-14

Parklife[edit | edit source]

All developer diaries about the Parklife expansion as well as patches 1.10 and 1.10.X.

No. Title and Link Description Date
1 Parklife Dev Diary #1: Park Areas Park Areas, types, leveling, gates, attractiveness, infoview and new panels. 2018-04-26
2 Parklife Dev Diary #2: Tours Walking Tours, Bus Tours, Hot Air Balloon Tours, infoview and new panels. 2018-05-02
2A Parklife Dev Diary #2: Tours Parklife winter map pictures from CO_EMMI. 2018-05-04
3 Parklife Dev Diary #3: New policies and buildings Policies, Park Maintenance City Service, Unique Buildings, Monument and props. 2018-05-09
4 Parklife Dev Diary #4: Maps and tree noise reduction New maps, terrain props, trees reduce noise pollution, and new animal models. 2018-05-15
5 Parklife Dev Diary #5: Modding and menu filtering Sub-meshes, Scripting API, Asset Data API, Cinematic Camera API, Menu Filtering. 2018-05-17
6 Parklife Dev Diary #6: Introduction to Tourism New Tourism Info View, New tourist and vehicle models, Mascots 2018-05-22
7 Word of the week 3 Word of the week 3 - 27/2018 - Parklife patch, Summer Holiday 2018-07-05

Green Cities[edit | edit source]

All developer diaries about Green Cities expansion as well as patches 1.9 and 1.9.X.

No. Title and Link Description Date
1 Word of the week 7 Word of the week 7 - 26/2017 2017-06-27
2 Word of the week 8 Word of the week 8 - 27/2017 2017-07-07
3 Word of the week 9 Word of the week 9 - 33/2017 2017-08-14
4 Word of the week 10 Word of the week 10 - 35/2017 2017-08-28
5 Green Cities - Dev Diary #1 Green Cities diary 1 - Gamescom and the Key Features 2017-08-31
6 Green Cities - Dev Diary #2 Green Cities diary 2 - The art of Green Cities 2017-09-07
7 Green Cities - Dev Diary #3 Green Cities diary 3 - Gameplay and Policies 2017-09-15
8 Green Cities - Dev Diary #4 Green Cities diary 4 - New City Services 2017-09-21
9 Green Cities - Dev Diary #5 Green Cities diary 5 - Specializations 2017-09-28
10 Green Cities - Dev Diary #6 Green Cities diary 6 - Free Update 2017-10-05
11 Concerts Update - Dev Diary #1 Concerts Update diary 1 - Update to the Concerts miniexpansion (Patch 1.9) 2017-10-11
12 Green Cities - Dev Diary #7 Green Cities diary 7 - New Maps and Scenarios 2017-10-12
13 Green Cities - Dev Diary #8 Green Cities diary 8 - Road Modding 2017-10-18
14 Word of the week 11 Word of the week 11 - 44/2017 - Budget Panel 2017-11-02
15 Word of the week 12 Word of the week 12 - 46/2017 - Colossal Order: Relocated 2017-11-15
16 Word of the week 13 Word of the week 13 - 48/2017 - Colossal Order: Office Sports 2017-11-30
17 Word of the week 14 Word of the week 14 - 50/2017 - Christmas (Patch 1.9.1) 2017-12-14
18 Word of the week 1 Word of the week 1 - 5/2018 - First mention of something new in the works 2018-01-29
19 Word of the week 2 Word of the week 2 - 9/2018 - Game designer Karoliina Korppoo departs CO 2018-03-02
20 Dev Diary: ChirpX Dev Diary: ChirpX 2018-03-09

Mass Transit[edit | edit source]

All developer diaries about Mass Transit expansion as well as patches 1.7, 1.7.X and 1.8.

No. Title and Link Description Date
1 Word of the week #4 - 6/2017 Working on some super cool stuff I’m not allowed to tell you guys just yet. Kyykkä. 2017-02-10
2 Word of the week 5 CO word of the week #5 - 8/2017 (Teaser about "Mass Transit" news coming.) 2017-02-24
3 Word of the week 6 CO word of the week #6 - 10/2017 ("Mass Transit" has been announced.) 2017-03-09
4 Mass Transit - Dev Diary 1 Mass Transit - Dev Diary 1 - More Than Just New Public Transport Types 2017-03-15
5 Mass Transit - Dev Diary 2 Mass Transit - Dev Diary 2 - Ferries 2017-03-29
6 Mass Transit - Dev Diary 3 Mass Transit - Dev Diary 3 - Blimps & Cable Cars 2017-04-12
7 Mass Transit - Dev Diary 4 Mass Transit - Dev Diary 4 - Monorails 2017-04-26
8 Mass Transit - Dev Diary 5 Mass Transit - Dev Diary 5 - Hub Buildings and intersection settings 2017-05-10
9 Mass Transit - Dev Diary 6 Mass Transit - Dev Diary 6 - Mass Transit in Action 2017-05-17

Natural Disasters[edit | edit source]

All developer diaries about Natural Disasters expansion as well as patches 1.6 and 1.6.X.

No. Title and Link Description Date
1 Dev Diary 1: Meteors and Helicopters The first disaster, meteors, and helicopters services. 2016-09-15
2 Word of the week #20 - 38/2016 Mariina visited Barcelona and Responsive City Symposium organized by the Institute for Advanced Architecture of Catalonia. 2016-09-23
3 Dev Diary 2: Scenario editor Description of the new scenario editor to be included in the next expansion. 2016-09-28
4 Word of the week #21 - 40/2016 A list of the included disasters. Meteor, thunderstorm, sinkhole, tornado, earthquake, tsunami, forest fire / fire spreading. 2016-10-07
5 Dev Diary 3: Thunder and Lightning and Fire Thunderstorms, lightning, fire spreading, forest fires, fire watch towers, helicopters. 2016-10-12
6 Word of the week #22 - 42/2016 Press conference in London and licensed content with Stadiums: European Club Pack 2016-10-20
7 Dev Diary 4: Tornadoes and Shelters Evacuation shelters to protect your citizens and some more flying cows. In-game trailer video. 2016-10-26
8 Dev Diary 5: Earthquakes, Sinkholes and Early Warning Systems Space Radar, Weather Radar, Earthquake Sensors and Tsunami Buoys. Earthquakes and sinkholes deform terrain. 2016-11-09
9 Dev Diary 6: Tsunamis and Waiting for the Release Tsunamis. Tank Reservoirs, Fresh Water Outlets, and the Pumping Service. 2016-11-23
10 Word of the week #23 - 48/2016 Patch notes 1.6.0 2016-11-29
11 Word of the week #24 - 51/2016 "Colossal Disasters" video. CO going on holiday. 2016-12-22
12 Word of the week #1 - 2/2017 CO back from the Christmas Holiday. 2017-01-12
13 Word of the week #2 - 4/2017 Not overhauling traffic AI. Patch notes 1.6.3-f1. 2017-01-26
14 Word of the week #3 - 5/2017 Quality Assurance. Plan for Colossal to expand starts with finding a new bigger office space. 2017-02-03

Patch 1.5[edit | edit source]

All developer diaries about patch 1.5.

No. Title and Link Description Date
5 Word of the week 5 Spring came to Finland. Reception for Landscaping update. Winners of the "Praise the Chirper Contest". 2016-04-06
6 Word of the week 6 Water Normal issue. Patching frequency/mods/QA. 2016-04-12
7 Word of the week 7 Patch notes 1.4.1 2016-04-19
8 Word of the week 8 Word of the week 8 2016-04-26
9 Word of the week 9 Word of the week 9 2016-05-03
10 Word of the week 10 Word of the week 10 2016-05-24
11 Word of the week 11 Word of the week 11 2016-06-02
12 Word of the week 12 Patch notes 1.5.0-f4. "Match Day" free DLC announced. 2016-06-08
13 Word of the week 13 Word of the week 13 2016-06-16
14 Word of the week 14 Word of the week 14 2016-06-23
15 Word of the week 15 Word of the week 15 2016-06-30
16 Word of the week 16 Word of the week 16 2016-07-08
17 Word of the week 17 Word of the week 17 2016-08-11
18 Word of the week 18 Word of the week 18 2016-08-25
19 Word of the week 19 Word of the week 19 2016-09-08

Patch 1.4[edit | edit source]

All developer diaries about patches 1.4 and 1.4.X.

No. Title and Link Description Date
1 Word of the week 1 Word of the week 1 2016-03-01
2 Word of the week 2 Word of the week 2 2016-03-08
3 Word of the week 3 Word of the week 3 2016-03-15
4 Word of the week 4 Patch notes 1.4 2016-03-22

Snowfall[edit | edit source]

All developer diaries about Snowfall expansion and patches 1.3 and 1.3.X.

No. Title and Link Description Date
1 Prepare for Snowfall Announcement 2016-01-20
2 New Things on the Roads Snow ploughs and Trams 2016-01-27
3 Snow and Heating New Policies and dynamic electricity use 2016-02-03
4 New and Free Free content, new public transport UI and weather effects 2016-02-11
5 Theme Editor A new tool for modders and content creators 2016-02-16

After Dark[edit | edit source]

All developer diaries about After Dark expansion as well as patches 1.2 and 1.2.X.

No. Title and Link Description Date
1 Night Time, what is it? Day and night cycle 2015-08-20
2 What's new with Modding? Changes related to Modding 2015-08-27
3 Expanded city services Police and transport 2015-09-03
4 Commercial specializations Commercial specializations 2015-09-10

Base game[edit | edit source]

All developer diaries about Cities: Skylines (base game) as well as patches 1.0, 1.1 and 1.1.X.

No. Title and Link Description Date
1 Roads How roads function 2014-09-24
2 Zoning Basics of zoning and zoning tools 2014-10-07
3 Natural Resources Types of resources and how to access them 2014-10-21
4 Public Transport Modes of public transport and how they work 2014-11-04
5 Outside Connections Tourism and Import/Export 2014-11-18
6 Map Editor Tools and functions of the Map Editor 2014-12-09
7 Simulation Simulation of individual Citizens and Vehicles in the game 2015-01-07
8 Districts and policies Districts and policies 2015-01-20
9 Info Views Info views 2015-02-03
10 Themes Themes 2015-02-17