PhotoGuessr

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

PhotoGuesser uses generative AI to assist in creating some pre-rendered audio content, such as sound effects and music used in the game. All AI-assisted audio content is reviewed, selected, and integrated by the developer before being included. The game does not use live generative AI during gameplay, and player input is not sent to any generative AI service.

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.