Warden of the Sunken Keep

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

AI generated art and other assets were referenced and partly used during development, but every effort is taken to make the game original. At UWS, we make every effort to support our art/design team and use AI very rarely to meet our production needs

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.