This study aims to analyze the factors that lead Korean online game companies, representative of Korea's cultural content industry, to pursue so-called Born Global strategies—attempting internationalization from the founding stage—and to examine these firms' overseas market entry strategies. To this end, the study reviewed the theoretical background focusing on previously researched Born Global facilitating factors and the network effects of online games, and derived propositions with an emphasis on network effects—namely, the network structure and externalities of online games. To demonstrate the validity of the propositions, a comparative analysis was conducted between the console game and online game industries, which differ in their network structure and externalities. Representative companies from each industry were compared using a case study methodology. The analysis results showed that because online games have greater direct network effects than console games, they adopt Born Global strategies for rapid market preemption and employ market entry strategies that manage communities rather than using complementary goods to maximize direct network effects. Finally, even within online games, it was found that when heavy users predominate, strategies that strengthen direct network effects are chosen, whereas when light users predominate, market entry strategies that maximize indirect network effects through complementary goods are selected.