Plot: CryptoKitties is a blockchain game on Ethereum developed by Canadian studio Dapper Labs that allows players to purchase, collect, breed and sell virtual cats. It is one of the earliest attempts to deploy blockchain technology for recreation and leisure. Wikipedia
Plot: The Sandbox is a sandbox game for mobile phones and Microsoft Windows, developed by gamestudio Pixowl and Animoca Brands and released on May 15, 2012. It was released for PC on Steam on 29 June 2015. Wikipedia