Welcome to the Roku Community, @memyselfandmind!
Thanks for contacting us about the games-to-download option on your Roku. We'd love to provide further information about this.
Please be informed that the games you've downloaded before will still be available if the app provider doesn't remove this on the Roku streaming platform. For future apps/games you want to download you may simply search it under the Streaming Store.
Let us know if you need further help. We'd be more than happy to continue doing so.
Best regards,
Carly
Carly Y.
Roku Community Moderator