DeckCrate

The developers describe how their game uses AI generated content like this:

In the interest of transparency: DeckCrate was built with the help of AI including the development of the app, UI, Steam assets and the documentation website under https://deckcrate.app. AI was a tool in the process and not a replacement for judgment. Everything that ships is reviewed, tested, and signed off by a human. Nothing goes out the door on an AI’s word alone: code is read and understood, behavior is verified, and the final decisions are made by the developer.

Required on Steam store pages since 2024. It covers content that ships in the game, on its store page or in its marketing — Valve does not require a disclosure for AI tools used during development, so this says nothing either way about how the game was made. Check it on Steam.