Description: The paper justifies the necessity of introducing innovative teaching strategies in school education and in particular - making use of educational games to motivate the students and to make the learning process and the school as a place more engagind and intriguing for them. The authors propose a concept for an educational mobile quest game with a strategy combinig the benefits of game-based learning, project-based learning and research-based learning. The paper outlines some specific problems of the educational system, provoking the development of the proposed concept and provides a review of the most popular videogames and a classification of game genres. The ideology of the quest strategy is analysed and the developed game concept is discussed. The concept envelopes a specification of requirements, specification of the context of use and a game strategy description. The proposed concept is intended to serve as a foundation of the design and implementation of the educational quest game. The pilot edition of the game is envisaged to be in the field of history, but the concept could be used in a wide range of subject domains