Bear With Me: The Pizza Chronicles (Prequel)

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

Some assets in Bear With Me were created with the help of generative AI tools. Specifically, the game's artwork (backgrounds and character illustrations) and the voice-over audio were produced using AI tools, then selected, edited, and assembled by the developer. The story, writing, choices, and game design were created by the developer. All AI-generated content was reviewed by the developer, who confirms the right to use it.

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.