The aim of this study was to investigate the consumption behavior and the factors affecting the buyers’ decision making on mobile application iOS games of the people in Bangkok. The data were collected from 400 buyers of the mobile application iOS games. The result of the study regarding consumers’ behavior showed that the most popular game was action games in which the respondents spent the time around 15 - 30 minutes per entry. The game purchase was less than 1 time per month, and the new information of the game was received through Apple’s Appstore. The persons who were influential in purchasing were friends, and most respondents bought the game about 1 – 2 US Dollars. According to the suitable game size, the respondents thought that it should be 41 - 80 megabytes, and they preferred downloading the game via their mobile phones rather than their computers. The respondents rated the importance of the marketing mix as a whole in the high level with the mean score of 3.55. Also, the price should be appropriate with the quality of the games. Regarding the product, the consumers were concerned about funny games.