An important message from the Cities: Skylines team, We have an amazing modding community and greatly appreciate the dedication and helpful nature thats been at the center of it for 7 years. Recently, there have been concerns in the community about reports of malware on the Steam workshop, which we want to address. We recently banned a few mods from the Cities: Skylines Workshop and want to clear up some of the misinformation surrounding these mods. The mods in question, which have been banned, are Network Extensions 3 and Update from Github. No keyloggers, viruses, bitcoin mining software, or similar has been found in mods on the Steam Workshop. Network Extensions 3, the mod alleged to contain malware, was banned due to discriminating against specific Steam users. First, it blocked a short list of Steam users from using the mod, but this was later changed to cause what appeared to be buggy gameplay. Blocking users or creating specific restrictions for them violates the Steam Subscriber Agreement and such resulted in the mod being banned. The mod Update from Github was removed shortly after appearing on the Workshop. This mod was designed to check for and install updates to mods directly from Github, making changes to existing Workshop subscriptions without the user's knowledge. This bypasses the Workshop entirely, and to avoid potential abuse (such as downloading malicious software) the mod has been removed. Harmony (Redesigned) has been mentioned in this context, however, the mod has not been updated since March 15th, 2021. Further updates to this workshop item are not possible as the account is banned and contributors are unable to update workshop items. In short:

• No keyloggers, viruses, bitcoin mining software, or similar has been found in mods on the Steam Workshop.
• The mod Network Extensions 3 was banned due to a violation of the Steam Subscriber Agreement.
• The mod Update from Github was removed as a potential risk, and only affected ~50 users.
• The Harmony (Redesigned) mod available on the Steam Workshop has not been found to contain the code to automatically update mods outside the Workshop.