While browsing the AppUp developer resources, i could not find any information regarding Multiplayer/Online-features. How am i supposed to port those features like -Matchmaking -Online-Highscores -Online-Achievements of an iOS-game, that have been originally implemented with GameCenter? On iOS, all of this is already available with GameCenter and accessed through the highlevel GameKit-framework. Is there any equivalent service for the AppUp-platform? Thanks, Florian