This work is based on research and literature which show how is self-esteem (self concept) related to the tendency of video game addiction and whether there is a difference between sexes. At the beginning of this work I mentioned primary characteristics of video games as well as positive and negative effects on the players. One of many negative affect is video game addiction, which can appear if player show some of the symptoms, so I am also mentioning about their prevention. Development begins from birth where we meet with the primary process of separation-individuation which needs to be successful as well as secondary separation-individuation. Family is the most important ambience for adolescent because of their importance in growing and developing. In research we find out how much time adolescents from Istra consume video games and does playing video games warns on beginning of an addiction. Based on research we can conclude that more time on playing video games is consumed by boys, unlike girls who are spending less time. Major reason of playing video games with the boys is their deficit in self-esteem and general satisfaction while in girls is desire for competence. Based on our research we have proved two hypotheses: 1. At both sexes there is a connection between the success of development overcoming and adolescent crisis and the levels of their addiction to the video games. 2. There is a difference between the sexes in the way that boys show a greater tendency toward video game addiction than girls and there is a difference in the aspects of self-esteem (self concept) that are significant to that.