This document summarizes the evolution of social gaming from individual arcade and computer games to massively multiplayer online games and social games. It outlines several stages of development: 1) Individual games played alone on TVs or computers in the home. 2) The rise of LAN parties and multiplayer games played together in internet cafes, allowing gamers to connect beyond a single screen. 3) The emergence of online games connecting players worldwide in complex virtual worlds that began to merge with real life. 4) The growth of social online games engaging hundreds of millions of players globally and driving economic impacts through microtransactions.