In 2017, CryptoKitties launched as the first game built on Ethereum. The game allows users to buy, sell, and breed virtual cats using ETH. The success of CryptoKitties sparked interest in the potential of blockchain technology for use in gaming and opened the floodgates for the development of blockchain-based games. These games are connected to a blockchain and use tokens to represent in-game items and assets. These tokens can be bought, sold, and traded on decentralized marketplaces, giving players true ownership of their in-game assets.