Connection Environment, billing system and payment system are the three characteristics of unique online game business model in Korea. The play pattern of Users depends on the game’s characteristics. The analysis of demography, connection times and playing time of gamers identifies the category of online games. The analysis is different between royal customer group and withdrawal customer group. Gamers group can be divided into two types as a light-user and a heavy-user. Online games also can be categorized into a casual game and a hardcore game. In the royal customer group the characteristics of a hardcore game impact gamers demographic and play pattern characteristics differently compare to the withdrawal customer group. These features can help for designing online game billing and payment system
