GKGameCenterViewControllerState.achievements The view controller should present a list of achievements. Declarationcase achievements See AlsoStatesGKGameCenterViewControllerState.defaultGKGameCenterViewControllerState.leaderboardsGKGameCenterViewControllerState.challengesGKGameCenterViewControllerState.localPlayerProfileGKGameCenterViewControllerState.dashboardGKGameCenterViewControllerState.localPlayerFriendsList