CryptoKitties
A popular Ethereum-based game about breeding cats from Dapper Labs in Canada. Introduced in 2017, players buy cats with Ether, and they become non-fungible tokens (NFTs) that can be bred and sold. Each cat has a 256-bit genome with attributes (catributes), which makes their offspring unique. With one million cats being bred in 2018, CryptoKitties was nearly a quarter of Ethereum's traffic.The first generation of CryptoKitties was auctioned off over the course of a year. Ever since, new cats are created by breeding; however, there will never be more than four billion. Owners can sell the offspring or get paid for breeding with another CryptoKitty. The MetaMask wallet is used for transactions. See MetaMask, Ethereum, crypto wallet and non-fungible token.
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| First and Second Generation |
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| These cats are an example of breeding from the CryptoKitties website. The two (top) are bred to create the one below. (Image courtesy of Dapper Labs.) |
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