ArUco is a fiducial marker detection library that uses a square marker system for identifying different patterns with unique values. This thesis explores the possibility to use those markers as an AR element in video games so, that any physical marker may represent any virtual object that is assigned to it in the software. Such system could be used for purposes, where the cost or volume of game specific cards is too high. First and second part of the thesis give a brief overview of AR/VR-, mobile- and overall video gaming industry. Third part looks into fiducial marker detection and more specifically ArUco technology. Fourth part describes the development process of a mobile application and fifth part presents the results of the carried out user testing.