
The period ranges from one minute to one week, and the more kittens a Kitty produces, the slower its cooldown speed will be. Each Kitty has a “cooldown speed” - a mandated resting period that occurs after a Kitty has been bred. Public sires charge additional breeding fees. Every time you breed a Kitty, you are required to pay a fee of 0.008 ETH, in addition to a transaction fee that varies based on Ethereum network congestion.

You can create a new Kitty by breeding two of your own Kitties or by using a “public sire,” which is a Kitty made available for breeding by its owner. Offers can be made on any Kitty in the game - not just the Kitties for sale in the marketplace. Alternatively, you can make an offer of your choice to the Kitty’s owner, who can choose whether to accept or decline. If you find a Kitty that you would like to purchase, you can click “buy now” to take ownership of the digital asset immediately. Some traits are more rare than others, and early-generation Kitties tend to be more valuable than later-generation Kitties. Additionally, every Kitty has “cattributes” or unique genetic traits - such as eye shape, eye color, and fur - that determine its appearance, and a generation that indicates when they were created. Each Kitty has a name, bio, and price (in ether). Where To Buy CryptoKittiesĪfter setting up your cryptocurrency wallet, you can explore the CryptoKitties marketplace to find Kitties for sale. To play with CryptoKitties, all you need is a computer that runs Chrome or Firefox, a cryptocurrency wallet like MetaMask or Dapper, and ether (ETH) to pay for fees and trades. Now, CryptoKitties can also be used throughout the growing landscape of Ethereum-based games, including on platforms like Decentraland, KotoWars, and Heaven.cat.

Smart contract technology and provably rare digital assets in the form of NFTs have helped grow Ethereum gaming into one of the most exciting sectors in blockchain, as evidenced by platforms like Nifty Gateway, OpenSea, Rarible, and NBA Top Shot. Every CryptoKitty is a unique NFT, coded to ERC-721 token standards, and has a set of “genes” that determine its appearance, which can be passed onto offspring by “breeding” CryptoKitties with one another.Īt its peak in 2017, CryptoKitties attracted more than 14,000 active users daily and propelled Ethereum technology to the forefront of the gaming industry for the first time. CryptoKitties was designed to introduce new users to blockchain technology in an accessible and gamified way akin to card-based trading games like baseball cards or Magic: The Gathering. Launched in 2017 by Axiom Zen, CryptoKitties is an Ethereum-based game that allows you to buy, sell, and breed collectible digital cats, and was an early and highly publicized example of non-fungible token (NFT) technology in action.
