https://www.reddit.com/r/Stadia/comments/h143ew/a_short_video_of_gods_and_monsters_gameplay/

“Regretfully, on Thursday morning, we mistakenly made an E3 2019 demo version of Gods & Monsters from Ubisoft available on the Stadia store that was not intended for the public to play,” a Stadia spokesperson said.
https://www.videogameschronicle.com/news/stadia-has-apologised-for-briefly-putting-an-unreleased-ubisoft-game-on-its-store/