GeForce NOW app v2.0.22.xx allows you to sync the Steam games you own to your GeForce NOW account. This will make it easy for you to determine which of the games you own are supported on GeForce NOW. You can find this setting under GeForce NOW app > Settings > Game Sync.
Steam Cloud Play, it seems, is a feature that will directly integrate your Steam library into services like GeForce Now, allowing you to play your Steam games from wherever you are. NVIDIA GeForce Now supports a lot of games, most of which are playable through your Steam library. GeForce Now says it now support more than 2,000 games that can be played through single-session installs, which also utilizes your Steam library. In essence, if you own a game on Steam, there’s a chance you can play it on GeForce Now.
Geforce Now Steam Workshop
To get started, click the chain icon to set up game sync. This will start the process to log in to your Steam account.
A web browser will launch, and you will connect to Steam followed by a prompt to “Sign into www.nvidia.com using your Steam account.”. Please verify that it says 'www.nvidia.com', this will confirm you are using games sync with NVIDIA GeForce NOW. You will need a Steam profile set to public and only the Game details subcategory needs to be public so that your owned games will sync with GeForce NOW. If you elect not to do this, game sync will not work. The sync process will only trigger when you press the resync button in GeForce NOW settings.
After you have logged into your Steam account, go back to the GeForce NOW app and confirm that you are logged in and synced to the Steam account. You will see your Steam account username, when it was last updated, and the number of games you own on Steam which are available to play on GeForce NOW. In the screenshot below, this account has 92 owned games which are supported on GeForce NOW.
Now you can browse to My Library. The synced Steam games will be added as the most recent games in My Library.
Geforce Now Steam Link
Each time you buy or redeem a new Steam game you will need to resync your Steam account to add the games to My Library. Go back to GeForce NOW app > Settings > Game Sync and press the Resync button. This will add your new Steam games to your GeForce NOW My Library.
If you wish to disable Steam account game sync, simply go back to GeForce NOW app > Settings > Game Sync and press the Disconnect button.
Please let us know how this feature is working for you and SEND FEEDBACK in the app if you are having any problems with it.