This document discusses strategies for achieving word-of-mouth marketing success for mobile apps and games. It identifies the key factors that make content go viral as being simple, unexpected, concrete, credible, emotional, and having a compelling story or structure. Charts show that 70% of players discover new games through word-of-mouth from friends and family rather than advertisements or reviews. The document advocates designing every aspect of a game and its accompanying media and messaging around these factors to maximize sharing and discovery.