Use Game Center to play with friends - Apple Support

Send friend requests, manage your profile, earn achievements, and compete on leaderboards across devices using Game Center.

View Live Activities in the Dynamic Island on iPhone - Apple Support

Game Center Overview - Apple Developer

2 Ways] How to Transfer Game Data from One Apple ID to Another

Apple ID: Everything You Need to Know - MacRumors

Share your activity in Fitness on iPhone - Apple Support

Can't add friends in Game Center to play … - Apple Community

How to Add Friends on Game Center in iOS 11

Apple Arcade friends: How to see what they're playing on Arcade

Deeper Controller Support and a Revitalized Game Center: Exploring

Everything you need to know about Game Center

View data shared by others in Health on iPhone - Apple Support

How to play with friends in Game Center on iPhone or iPad - iGeeksBlog