Patch 1.17.1-f4 is out.

Latest patch notes

If you do play modded, you will be greeted with a notification when you start the game alerting you that some mods you are subscribed to haven't been created for the current version of the game. Opening the Content Manager will show you which mods were not made for the current version of the game, however, this does not mean the mod is broken. The notification is there to help troubleshoot but to determine which mods are known to be broken and which have been fixed, please see the list on the spreadsheet which can be accessed by clicking List Incompatible Mods.

Modders have been hard at work preparing updates, so please be patient while they apply those to the Workshop and sort out any issues that may not have been found in testing. Check the spreadsheet regularly to see which mods are still needing an update.

• Check the list of broken mods below
  
• Don’t overwrite - save your city as a new savegame
  
• Wait for mods to update - or help see what mods need an update.
  
• Play unmodded while you wait using the -noWorkshop launch option

Most likely yes, but it might be a few days depending on what mods you use. Some mods are required for a save to load correctly, and if they need an update, you will have to wait for them before loading your city.

Most likely yes! Our awesome modding community is working hard to find issues and update mods, but it’s important to remember, they do this as a hobby so it may take a little while. Some updated mods may be released as new mods, in which case make sure to unsubscribe from the old version. Below are some mods expected not to be updated and their replacements. It’s recommended that you switch these as soon as possible, also before the patch goes live.

For the most up-to-date information on which mods are broken, check out the community-maintained spreadsheet:
https://pdxint.at/BrokenModCS

Broken mods

• Extended InfoPanel - broken, use Extended InfoPanel 2 instead
  
• Loading Order Mod - use Skyve instead

This is not a complete list, but can hopefully give you some idea of what mods to keep an eye on before loading your city.

Network mods
These include any mods that add networks. Anything in the Roads category on Steam is not counted, only those in the Mod category.

• Extra Train Station Tracks
  
• German Roads
  
• Metro Overhaul Mod
  
• More Train Tracks
  
• Network Extensions 2
  
• One Way Train Tracks
  
• Tram Station Track

Major mods
Mods that have a large impact on how the game works are generally needed for your city to work as it should. These include, but are not limited to:

• 81 tiles
  
• Any Road Outside Connections
  
• Custom Zone Mixer
  
• Improved Lane Connections v2
  
• Lifecycle Rebalanced Revisited
  
• More CitizenUnits
  
• More PathUnits
  
• More Vehicles
  
• Nursing Homes with Eldercare
  
• Optimised Outside Connections
  
• Ploppable RICO
  
• Realistic Population (or other mods that affect population numbers)
  
• Reversible Tram AI [BETA]
  
• Traffic Manager: President Edition
  
• Transfer Controller
  
• Transfer Manager CE
  
• Transport Line Manager

While you can’t play your modded city, why not check out the new content without mods? You can easily do this by adding the -noWorkshop launch option to Steam. To do this right-click on the game in your Library, select Properties, and type in -noWorkshop (exactly like that) in the box at the bottom, and close the window to apply. This disables all workshop content.

Just make sure to start a new city and save it as a new file, so you don’t overwrite your existing city.