Providing an online marketplace for buyers and sellers of blockchain-based non-fungible assets, namely, image files containing artwork relating to avatars and virtual worlds authenticated by non-fungible tokens (NFTs); Online retail store services featuring virtual goods, namely, downloadable computer game software for virtual worlds featuring social games and game enhancements; Online retail store services featuring virtual assets in the nature of avatars, avatar wearables, accessories, avatar names and emotes, and virtual real estate for use by members of an online community in connection with online virtual worlds