FRAGLINE: Esports Manager

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

Pre-Generated AI content: the illustrations used for in-game news stories in the esports portal (145 images). These were generated with AI tools during development, then filtered and edited by hand against a fixed set of rules: no depictions of people, no readable text, and a fixed colour palette matching the game UI.

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.