The project explores to what extent Classcraft, a role playing game dedicated to classroom management, promotes positive behaviour in students and supports teachers’ decisions. The project explores connections between specific features of ludicization and students’ positive behaviour. It focuses on students’ appropriation of classroom rules . This joint study between UNITRI (Brazil) and the University of Fribourg (Switzerland) examines the consequences of teachers’ decisions and cultural nuances in both students’ behaviour and teachers’ practices in the context of the use of the game.