“…Players stay in a game if they can continuously have fun in the game, which is decided collectively by a myriad of factors. Some of the factors are measurable, such as the game server and software reliability, frequency of lags [2], and number of cheating incidents [3], while others are unmeasurable, such as the artistic design, sense of achievement provided [4,5], and even in-game atmosphere created by the combination of all the visual and audible elements [6]. To clarify further discussion, we define the capability that a game retains players once they join the game as the addictiveness of the game, as it quantifies how probable the game can make a player addicted to it.…”