As of the date of this post, there is no way to remove games from your catalogue, I guess the developers didn't anticipate people wanting to get rid of games. https://community.stadia.com/t5/Sta...
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As of the date of this post, there is no way to remove games from your catalogue, I guess the developers didn't anticipate people wanting to get rid of games. https://community.stadia.com/t5/Stadia-General/How-do-I-delete-hide-games-from-my-library/td-p/21783