A reminder that most existing (not-bundled) Chromecast devices will not support Stadia until they're updated over the next few weeks. You can check if your Chromecast Ultra can run Stadia by checking if it's running version 1.42.180348 or above. If your Chromecast is not on that version, attempting to play games on that Chromecast will fail until it receives the upcoming Stadia update. For now, we recommend using the Chromecast Ultra in your bundle to play.
Someone on the Reddit group for Stadia mentioned he was able to update his CCU and play Stadia on it and left instructions on how to do so. I'm not endorsing doing it since idk if it's breaking any Google rules to do so. But I'm just saying it exists.
@Dinn The method is basically opting for the preview program. It's definitely not breaking any Google rules and safe to do so.
Hello @GraceFromGoogle, I am looking for some guidance here. I bought and used The Founder’s edition in the USA. I have since moved to Germany (and travel a significant amount which is what interested me in Stadia). Unfortunately in the move I lost the Chromecast Ultra that was originally shipped to my USA address. Now that I am in Germany, which Chromecast Ultra should I be using? Is one even available seeing as I purchased the Founder’s Edition? Any direction, URL, and/or replacement help is greatly appreciated.