According to a recent rule change, developers who want to publish games on Steam can’t integrate NFTs or other blockchain technology.
Blockchain in Games
On Twitter, @SpacePirate_io pointed out the change. Valve says it doesn’t allow games to feature items that have real-world value.
According to Valve’s onboarding list, number 13 under “What you shouldn’t publish on Steam” says: “Applications built on blockchain technology that issue or allow exchange of cryptocurrencies or NFTs.”