CryptoKitties is another Ethereum-based decentralized application. CryptoKitties is a virtual pet simulator, where users can buy, trade, and breed kitties on the blockchain. CryptoKitties was an important landmark for Ethereum, as the techniques developed for CryptoKitties have applications for all video games that may use blockchain. Using techniques similar to Cryptokitties, player equipment, characters, and so on, can be stored on a blockchain.

This is important, because many online video games, such as Minecraft, World of Warcraft, and so on, have suffered from bugs where certain equipment in the games could be duped, and people could make unlimited clones. Using blockchain, each item is assigned a unique reference and can be tracked and traded just like real goods.

Inspired by CryptoKitties, a number of video games are coming to market using these systems to create worlds with genuine scarcity and real economies.