This document outlines social mobile game design principles presented by Duke Wong. It discusses using friends through connecting on Facebook and helping friends progress. It also covers using ranking systems like leaderboards and leagues to motivate players. Competition principles include matchmaking, emotes, and reputation systems. Donation allows helping other players directly or as a community. Creating an in-game society can replicate politics and alliances. Case studies show how education games have used these principles for worldwide adoption and teaching business concepts. In conclusion, these social principles from mobile games could be applied to serious games as well.