Add multiplayer compatibility
The Multiplayer Compatibility section of App Store Connect allows you to describe which versions of your Game Center-enabled apps can see each other during the matchmaking process. You can define the earliest multiplayer-compatible app version for iOS, macOS, and tvOS, and can even match games with different bundle identifiers against each other.
Select the earliest compatible version of an app
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From My Apps, select your app. The page opens with the App Store tab selected.
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In the sidebar, click the app version below your desired platform, then navigate to the Game Center section.
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Click the add button (+) to the right of Multiplayer Compatibility.
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In the dialog that appears, select the app(s) that you want your app to be compatible with.
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Select the earliest compatible version of your app from the menu. Only Game Center-enabled app versions will be available to select.
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To add more compatible apps and versions, repeat the above steps for each app.
Note: Before you can test multiplayer compatibility for your app, you'll need to complete the steps above.