In this paper we discuss the concept of ludicization by describing an empirical work devoted to the design of the Tactileo Map, a geomedia dedicated to the design of location-based games for educational purposes. The Tactileo Map is the result of collaborative efforts by researchers, game-designers, and practitioners involved in Tactileo, a national project funded by the French Government. This web application designed for digital tablets enables teachers to create location-based games for primary and secondary education. In this paper, we describe the collaborative methodology implemented within the project, the application Tactileo Map, as well as Geochrono Scouts, a game designed with the application Tactileo Map as proof of the concept tested in a lower secondary school in France. The purpose of this paper is to propose a framework for fieldwork ludicization, focused on the play ‒ the situation experienced by the learner, rather than on the game itself ‒ when it comes to introducing a game-based approach into an educational context.