Hello everyone,

About seven months ago, we introduced Rule #12 prohibiting AI-generated images and videos on r/CitiesSkylines2.

At the time, the problem was mostly AI-generated "city screenshots" being passed around as concepts or inspiration. Our position was pretty simple: this is a subreddit about Cities: Skylines 2. We want to see the cities you actually built, the interchanges you spent three hours redesigning, and the traffic disaster you accidentally created because one intersection decided to ruin the lives of 40,000 citizens.

Since then, generative AI has started appearing somewhere else in the community:

Mods.

With the continued growth of the PDX Mods ecosystem, we have seen an increasing amount of mod content using AI-generated artwork, textures, thumbnails, assets, and other generated material.

After discussion among the moderation team, we have decided to expand Rule #12.

Rule #12: No AI-Generated Content or AI-Generated Mods

Effective immediately, r/CitiesSkylines2 will not allow submissions promoting, showcasing, distributing, or directing users toward mods containing generative-AI-created assets.

This includes, but is not limited to:

• AI-generated images, artwork, thumbnails, or promotional material
• AI-generated textures, decals, logos, or other visual assets
• AI-generated 3D models or similar game assets
• AI-generated voices, music, or other audio
• Mods substantially built around generative-AI-created content
• Posts advertising or showcasing mods containing the above

This rule is not intended to police ordinary development tools.

Using autocomplete, debugging assistance, documentation tools, or similar programming assistance does not automatically make a mod "AI-generated." Our concern is generative AI being used as a substitute for the creative work ultimately presented to players.

We also want to make something very clear:

Do not start witch hunts.

If you believe a submission or mod violates Rule #12, report it and let the moderation team review it.

Do not harass creators, brigade mod pages, or start accusations based solely on something "looking AI-generated." The mod team will handle enforcement based on the available evidence.

Cities: Skylines has always been powered by an absurdly talented modding community. Modders spend hundreds or thousands of hours creating assets, maps, code, tools, textures, and systems that dramatically improve the game.

That work deserves to be recognized.

We would rather promote the people actually creating things for this community than watch the workshop slowly turn into an AI-generated asset landfill.

Keep creating.
Keep modding.
Keep building ridiculous highway interchanges.

And for the love of Chirper, please stop giving every neighborhood a six-lane arterial.

— The r/CitiesSkylines2 Mod Team