Leaderboards let players participate in new competitions within your game and challenge other players to beat their score. Players see how they rank among global players, as well as their Game Center friends. You can even create a friends-only leaderboard in your custom UI. Classic leaderboards are ongoing and maintain a player’s score forever. Use these to showcase scoring for overall or lifetime events, such as all-time number of matches won or the shortest time taken to complete a level. Recurring leaderboards are short lived and expire, then repeat after a set time, such as daily, monthly, or weekly. Use recurring leaderboards for timed live events — for example, to show the most matches won in a week. You can use one or both leaderboard types in your game.
Players can receive push notifications about leaderboard activity — such as when someone passes their score — so they can stay on top of the latest activity in your game and stay engaged.
Achievements are special milestones that indicate when a player has successfully reached a particular goal in your game. You decide which achievements are relevant to your game and worth offering to your players. Players see achievements as locked, in progress, or completed. You can also create hidden achievements, which only appear once they’re completed. Consider using hidden achievements to prevent spoilers in your game and to surprise and delight players. You can provide up to 100 achievements, each of which can award up to 100 points, and your game can award up to 1,000 points in total. Keep these limits in mind when releasing the initial version of your game, as you may want to add new achievements in future updates. For variety, consider creating a set of achievements that require dedication and a range of skills to complete.
Challenges let players compete directly with friends to beat a high score or accomplish a specific achievement. By default, challenges are not displayed on the dashboard. Opt in to display challenges on the dashboard using App Store Connect.
The Game Center dashboard is the central place where players can access their profile and interact with Game Center features that your game supports. Players can view their achievements and leaderboards, as well as a feed of the latest activity from friends, within your game. They’ll also be able to view other games their friends are playing, as well as scores and achievements. Players can tap an activity to be taken to the relevant destination — for example, when someone taps an activity notifying them that several friends are playing your game, they’re taken to your game so they can start playing.
Add an access point to give players an easy way to get to the dashboard within your game. When the access point initially appears, you have the option of showing highlights — such as the number of achievements or default leaderboard ranking — providing players with quick insight into their progress. After showing any highlights, the access point collapses to display the player’s avatar.
Game Center supports real-time and turn-based multiplayer functionality, helping players connect without leaving your game. Players can invite Game Center friends, contacts, iMessage groups, and nearby players, or automatch with other competitors to quickly start playing on iOS, iPadOS, and macOS. With SharePlay integration, players can automatically join a game with friends from a Group FaceTime call.
Game Center connects players inside and outside of your game. Players can start multiplayer games together, find out where friends rank on a leaderboard, keep up with what friends are playing on the App Store and in Game Center widgets — and much more. And the friend request inbox lets them easily manage requests in one place.
You can leverage the Friends API to create frictionless social and multiplayer experiences. Let friends go on missions together, display a friends-only leaderboard in your custom UI, and even show friends’ progress within progression maps. Players are prompted for access to their list of Game Center friends on a per-game basis, so they always have control over sharing their activity.
In Contacts, contact cards of Game Center friends include a link to their profile, and people can tap a button to invite other contacts to be friends too.