This document summarizes the key topics discussed at the 2018 GDC conference on mobile games. It discusses the state of several popular mobile games, trends in genres like story-based games and battle royale games, and lessons learned over the past year. Some of the major games and trends highlighted include the continued success of Candy Crush, the falling popularity of Game of War, the growth of story and collection-based games, and the mobile adaptation of the battle royale genre through games like Clash Royale. The document also emphasizes that gameplay quality, franchises, meta-games, and collection mechanics are increasingly important for driving engagement in the mobile games market.