Gamification is defined as the use of games or their design elements, in a context that no fun game is taking place, in order to achieve specific desired results. It is a relatively new method which is gaining increasing acceptance and is being used more and more in recent years in various fields. The results of this method are quite positive and it is proved that through gamification specific desired behavioral changes can be achieved in the individuals applied. Thus, after a period of application in areas such as business, education and health, there is usually a significant improvement in consistency, docility, productivity, dedication and interest of individuals. In this thesis the application of gamification in the training of Air Traffic Controllers will be studied.This is a bibliographic thesis that aims at the conceptual design of a game, which can be applied to the training program of Air Traffic Controllers, increasing its effectiveness. The game that will be developed, will be applied in a specific stage of the training of Air Traffic Controllers in Hellenic Air Force. In present thesis, the definition of gamification is first given, a historical review is made and its basic elements and the categorizations that exist around it are described. Then are mentioned some examples of the application of gamification in areas such as health, education and business. In the following is described the training framework for Air Traffic Controllers at both European and National level and special emphasis is given to the procedures applied by the Hellenic Air Force in this area. Based on these procedures, a game is developed that is a mobile phone application and all the details about its conceptual design are described in detail. Finally, in the context of a report on the application developed, some useful conclusions are drawn for it and some suggestions are made regarding how to implement it in real life.