Has anyone actually made an NFT that you can share between two games made by completely unrelated developers? Crypto fanciers keep on offering this as a usecase for NFTs despite the myriad game balance, developer time, and cross-compatibility issues it would create.

Games that are not available don't count, neither do games that say you'll be able to do it "soon". Pointing a game to an ugly monkey jpeg you "own" doesn't count either. Getting a character, weapon, costume piece, companion, etc, in one game, and transferring it to a completely unrelated game does count.

Someone in the crypto ecosystem working on a framework to make it easy for a game developer to allow import/export of game items as NFTs in a standardized way halfway counts.