A handful of popular Cities: Skylines mods have been banned from the Steam Workshop by developers Colossal Order. One, "Network Extensions 3", violates the Steam Subscriber Agreement by "discriminating against specific Steam users" blocking them from using it, Colossal Order say. Another mod, "Update From Github", aimed to circumvent the Steam Workshop entirely by allowing updates to mods to be installed directly form Github while "making changes to existing Workshop subscriptions without the user's knowledge."
Complicating matters somewhat is a sea of rumours about what else the mods contained, and a series of counter-allegations about Colossal Order from the creator of the mods.
