You don't need NFTs to transfer stuff between games, it doesn't even make it simpler. I suppose you could argue that it somewhat simplifies the part where the p

You don't need NFTs to transfer stuff between games, it doesn't even make it simpler. I suppose you could argue that it somewhat simplifies the part where the player proves to the game what he owns, but the real issue is for the games to decide to cooperate in the first place, so if they cooperate on recognizing ownership, and the definition of the trophies, then they are already cooperating.