Curling Stars

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

I built Curling Stars in close collaboration with AI tools. I directed every part of the game myself, the design, gameplay rules, features, venues, art direction, and testing, while an AI coding assistant wrote and iterated on the code, procedural 3D scenes, characters, and animations under my direction. The soundtrack was created with AI music generation, curated and selected by me. Rosters and characters are fictional. Store artwork used Gen AI tools.

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.