Computer game software downloadable from a global computer network; Downloadable audio and video recordings featuring video game characters and items authenticated by non-fungible tokens (NFTs); Downloadable computer game software; Downloadable computer game software for personal computers and home video game consoles; Downloadable computer software for managing and validating cryptocurrency transactions using blockchain-based smart contracts; Downloadable computer software for managing cryptocurrency transactions using blockchain technology; Downloadable computer software for use as a cryptocurrency wallet; Downloadable electronic game software for use on mobile and cellular phones, tablet computers, handheld computers, personal computers, and game consoles; Downloadable electronic game software for wireless devices; Downloadable image files containing artwork, video game characters, video game character textures and models, virtual clothing, and video game items authenticated by non-fungible tokens (NFTs); Downloadable multimedia file containing artwork relating to a video game authenticated by non-fungible tokens (NFTs); Downloadable multimedia file containing artwork, text, audio, and video relating to a video game authenticated by non-fungible tokens (NFTs); Downloadable multimedia file containing audio relating to a video game authenticated by non-fungible tokens (NFTs); Downloadable multimedia file containing text relating to a video game authenticated by non-fungible tokens (NFTs); Downloadable multimedia file containing video relating to a video game authenticated by non-fungible tokens (NFTs); Downloadable video game software; Downloadable video recordings featuring video game characters and items authenticated by non-fungible tokens (NFTs)