The purpose of this study is to examine the relationship between the online games played by adolescents, as distinguished by their gender, grade level, and academic achievement. The sample of this research comprises 426 students studying at secondary schools in Istanbul. “Online Game Experience Questionnaire” was used in the research. The results were analyzed with a SPSS 16 packet program and the analyses were tested at a level of 0.05 significance. Descriptive statistics such as arithmetic mean, standard deviation, percent and frequency were used in the assessment of the data, along with independent group t-test, variance analysis, and LSD statistical techniques. According to the research results, social media games and action games are the most popular games among adolescents. These are followed by sports games, strategy games, table games, and car racing games. Simulation games are the least preferred among adolescents. Simulation and social media games do not distinguish according to sex, as do other types of games. Games played according to grade level differ only in car racing games. Game genres other than action games do not show any differentiation in school report success.