Use this skill for GameKit and Game Center implementation and review across Game Center entitlement setup, GKLocalPlayer authentication, authenticateHandler, scoped player identifiers, GKAccessPoint, Game Center dashboards, GKLeaderboard, GKAchievement, GKMatchmakerViewController, GKMatch, GKTurnBasedMatch, multiplayer matchmaking, saved games, challenges, friends, nearby discovery, and server identity verification.
