Valve has implemented a policy to reject games that incorporate AI-generated content due to copyright concerns. A developer shared on the "aigamedev" subreddit that their game submission was rejected by Valve, citing the need for all necessary rights and protection of intellectual property.
https://www.jdsupra.com/legalnews/valve-rejects-games-with-ai-assets-over-1050594/
https://www.jdsupra.com/legalnews/valve-rejects-games-with-ai-assets-over-1050594/