Game Center is described as «brings social gaming to OS X and iOS apps. With the Game Center app, you can play against friends and unknown foes anywhere in the world. Invite someone to join, then get a game going» and is an app in the social & communications category. There are more than 25 alternatives to Game Center for a variety of platforms, including Online / Web-based, Windows, Android, iPhone and Mac. The best alternative is Steam, which is free. Other great apps like Game Center are Kongregate, Google Play Games, Nakama and FreeToGame.Game Center alternatives are mainly Game Stores but may also be Social Networks or Movie Databases. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Game Center.