Cities: Skylines is a modern take on the classic city simulation. The game introduces new game play elements to realize the thrill and hardships of creating and maintaining a real city whilst expanding on some well-established tropes of the city building experience.

Public builds
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Counted once we have watched for 90 days (since 21 Oct 2026)
Distinct builds deployed to a game's public (default) Steam branch, as Steam's client network describes them.
Checked within minutes of each Steam change. Observed since 21 Oct 2026.
Source: Steam client network (PICS), App info, public branch. Full methodology
Latest public build
Build 22724702
Update posts
4 postsPosts announcing an update, tagged or not
Posts in a game's official Steam news feed that announce an update: tagged as patch notes by the developer, or plainly about a patch or a released update.
Source: Steam Web API, ISteamNews/GetNewsForApp. Full methodology
Typical gap between builds
Not enough builds yet| Build | Went live | Patch notes |
|---|---|---|
| 22724702 | Patch Notes for 1.21.1-f9 |
From Steam’s client network, last checked . Builds before 21 Oct 2026, when we started watching, aren't listed. Patch notes are the developer’s update post from an hour before to a day after the build. Not every build gets one. How we count
| Posted | Update |
|---|---|
| 15 Apr 2026 | Patch Notes for 1.21.1-f9 Patch notes |
| 7 Apr 2026 | Patch Notes for patch 1.21.1-f8 Patch notes |
| 17 Mar 2026 | Patch Notes for patch 1.21.1-f7 Update |
| 9 Mar 2026 | Race Day Patch 1.21.1-f4 - State of Mods and Patch 101 Update |
| 25 Mar 2025 | New Content and Anniversary Patch - 1.19.2-f3 Patch notes |
| 29 Oct 2024 |
| Mountain Patch - 1.18.1-f3 Patch notes |
| 21 Jun 2023 | Patch Notes for patch 1.17.1-f4 Update |
| 12 Jun 2023 | Patch Notes for patch 1.17.1 Update |
| 21 Mar 2023 | Patch Notes for 1.16.1-f2 Update |
| 15 Nov 2022 | Releasing Today | Skyscrapers | Hearts of Korea | 2 Radio Stations | Free Update Update |
| 10 Mar 2022 | Birthday patch 1.14.1-f2 Update |
| 11 Feb 2022 | Update on patch 1.14.0-f8 Update |
| 10 Feb 2022 | Airports post-release patch 1.14.0-f8 Update |
| 30 Nov 2021 | An Update from Cities: Skylines Update |
| 4 Jun 2020 | Patch notes for 1.13.1-f1 Patch notes |
| 6 Apr 2020 | Patch Notes for 1.13.0-f8 Patch notes |
| 25 Mar 2020 | Sunset Harbor Patch Notes Patch notes |
| 28 Jan 2020 | Paradox Launcher update - v2020.1 Patch notes |
| 22 Jan 2020 | Version 1.12.3 Patch notes |
| 4 Jun 2019 | 1.12.1-f1 Patch Notes Update |
| 20 May 2019 | Campus 1.12.0 Patch Notes Update |
| 13 Dec 2018 | Holiday Surprise Patch: Full Notes Update |
| 23 Oct 2018 | Cities: Skylines Industries 1.11.0-f3 PATCH NOTES Update |
| 4 Jul 2018 | Cities: Skylines 1.10.1-f2 Patch Notes Update |
| 24 May 2018 | 1.10 Parklife Patch Notes Update |
| 23 Mar 2018 | 1.9.3-f1 ChripX the second Patch Notes Update |
| 9 Mar 2018 | Celebrate Cities: Skylines 3 year anniversary with some FREE Surviving Mars themed content in the 1.9.2-f1 'ChirpX' Patch Update |
| 5 Dec 2017 | Carols, Candles and Candy / All That Jazz 1.9.1 Patch Notes Update |
| 19 Oct 2017 | Green Cities 1.9.0 Patch Notes Update |
| 17 Aug 2017 | Concerts 1.8.0 Patch Notes Update |
| 17 May 2017 | Cities: Skylines - Mass Transit Free Patch Update |
| 11 Dec 2016 | Here are the patch notes for patch 1.6.1-f2! Patch notes |
| 22 Mar 2016 | Update 1.4 is live! Introducing Landscaping and Canals! Update |
| 17 Feb 2016 | Snowfall patch notes (1.3.0) & release information Update |
| 5 Nov 2015 | Patch 1.2.2-f2 is live | Building limits increased! Update |
| 24 Sept 2015 | After Dark IS HERE!! Patch notes |
| 1 Jul 2015 | Patch 1.1.1b is LIVE! Update |
| 19 May 2015 | European Buildings and Tunnels are here! Patch notes |
| 7 Apr 2015 | Bugfixing-Patch 1.0.7c is LIVE Update |
| 27 Mar 2015 | Patch 1.0.7b has arrived! Update |
| 19 Mar 2015 | Patch 1.0.6b is LIVE! Update |
Steam keeps no record of past build numbers, so before 21 Oct 2026 a game’s update history comes from its own Steam news: posts tagged as patch notes, and untagged posts that plainly announce a patch or a released update. Older posts are still being read in, most played games first. How we count