For Chromecast, you do. > Which Chromecast devices are compatible with Stadia? > For launch in November, only the Google Chromecast Ultra will be compatible w

For Chromecast, you do. > Which Chromecast devices are compatible with Stadia? > For launch in November, only the Google Chromecast Ultra will be compatible with Stadia, and you will also need a Stadia Controller and access to Stadia to play with Chromecast. Access to Stadia in November is only available through the Founder's Edition or through a Stadia Buddy Pass. Stay tuned for future announcements regarding additional device compatibility. https://support.google.com/stadia/answer/9338946?hl=en https://support.google.com/stadia/answer/9338946?hl=en