To celebrate an event in which more information on its first cloud gaming platform was released, Google has prepared a "Stadia Founder's Edition". It consists of a Stadia Controller in an exclusive Night Blue colorway and a Chromecast Ultra. It may help play the range of Stadia titles that were confirmed today.
https://www.notebookcheck.net/Google-releases-a-Founder-s-Edition-to-mark-inaugural-Stadia-Connect.423139.0.html