Cities: Skylines II Spring Cleaning - Patch 1.5.7f1 (29th April 2026)

• New launch parameter -benchmark to start benchmarking directly on startup.

• New chapters have been added: Building Customization, Road Zones.

Gameplay:

• Stopped citizens from moving in and out with taxis to reduce the move-in traffic.
• Reduced the overall dog population by adjusting household pet limits and spawn probabilities. No dogs were harmed in this process. Affects new households (including in existing saves).
• The Education system has been balanced to better align elementary and high school demand, reducing extreme imbalance with elementary schools while high schools remained underused.
• Reduced cases where citizens get stuck during robberies.
• The “Urban Cycling Initiative” policy now increases bicycle usage from 20% to 50%.
• Fixed mixed housing causing commercial and medium-density residential demand to permanently stay low.
• Fixed signature offices being incorrectly treated as available for sale, causing office demand to drop even while occupied.
• Fixed office demand using wrong data for citizens and removing a multiplier workaround, which was causing too many Software companies to spawn. City production statistics are now sampled over a longer time period, reducing fluctuations caused by time of day.
• Fixed an issue where a handful of commercial buildings received no customers, killing demand. Commercial demand is now based on how well-stocked your shops are on average.
• Fixed outside connections not working with non-highway roads.
• Fixed an issue where students could only participate in leisure activities during study time.
• Fixed an issue where buses and trams could get stuck in a permanent boarding state at busy stops, preventing departure and causing vehicle queues and despawning.
• Fixed an issue where building upgrades could stall and not progress when resource delivery processing was skipped during certain update frames, causing the level indicator to become stuck.
• Fixed port mail transfer pathfinding.
• Fixed an issue where some offices could stop producing or trading in certain situations.

UI:

• Added option to adjust toolbar size
• Buttons and some other elements will scale with the toolbar.

• Affects toolbar and panel background transparency.

Visual:

• Improved wind transitions for vegetation LOD changes, making tree movement smoother when switching between detail levels.
• Disabled moon light and shadow casting during the day and daylight and shadow casting during the night to improve performance.
• Iceflake Arena
• Added additional parking slots. The fix only applies to Iceflake Arenas built after the update, so you will have to rebuild it if you have already placed it.
• Adjusted LOD transition distance on Low and Medium settings to prevent premature visual downgrade.

Misc:

• Main menu FPS limited to 120 to reduce GPU stress.
• Database corruption error messages are now more descriptive.
• Added missing localized text to the encyclopedia.
• Fixed small text errors in the encyclopedia.

Bridges & Ports:

• Fixed an issue where commercial and industrial buildings did not use B&P DLC ports for importing goods, instead relying on outside connection routes even when goods were available at the port.
• Updated base game and B&P achievement icons.

Paradox Mods:

• Updated Paradox SDK to version 2.1.2 and Paradox Mods UI to version 2.0.4.
• Added support for Playset Sharing.
• Added parallel mod downloads with up to 3 mods at a time.
• Improved the download percentage tracking to fix the download progress getting stuck towards the end.
• Opening the Mods UI, subscribing, unsubscribing, and managing playsets can now be done without waiting for mod downloads to be done.
• Improved the sync conflict popup with more information about the situation.
• Improved the responsiveness when subscribing, unsubscribing, enabling, or disabling mods.
• Updated the folder structure where mods are stored on disk.

Known Issues:

• The update download size for this patch is larger than it would otherwise need to be, due to internal build system changes. This is a one-time issue only.
• The Microsoft Store build is missing the taskbar icon.
• Rarely, robbers and the arresting police can still get permanently stuck during robberies; we will keep working on this.
• Shadow cascade calculations cause incorrect shadow drawing. This is especially visible when looking at big objects from a low point of view (close to the ground).