Group dynamics and its impact on the organization are gaining more and more importance in obtaining employee effectivness. Organizations benefit if employees have good interpersonal relationships, and the continous development of there relationships is the key to a business's competitive advantage. A frequently used method of improving group dynamics is team building. It is an activity that tries to improve the efficiency of the work group, maintain good relations among the members and thus contributes to the wider organizational system (Coghlan, 1994). A significant positive efect of team building is the creation of awareness and a positive attitude of individuals in the group for creating a desire to work with other members and to work in synergy with each other, i.e. it encourages the development of group cohesion. Team building activities are diverse, but they should be continuously developed in the view of changing habits of generations of employees. Today, as much as 79 % of the world’s population is involved in computer games in some form (Newzoo, 2022), and even 64 % of the Baby Boomer generation admitted playing computer games during working hours (Wordtips, 2022). In this paper, the usage of computer games for the purpose of team building was analyzed on a sample of companies that participated in the event “Good Game Zagreb 2022.“. At this business to business event, teams had the opportunity to fight together on the virtual fields of computer games and at the same time develop quality team relationships. On a sample of 176 employee players and 120 employee fans, who answered the customized GEQ questionnaire, it was found that the process of transforming a group of employees into a cohesive team had been achieved. The results of the research showed that the usage of computer games for the purpose of team building achieved positive effects in the development of the team. In addition to conducting a survey questionnaire, in-depth semi-structured interviews were held with human resource managers of the competitor companies, where a positive effect in team development was noticed due to gaming pre-activites organized by the HR department. All respondents confirmed that team building had a positive effect on all employees, especially regarding the mutual acceptance and connection of all tournament participants.