Computer science is a challenging discipline on many levels, and it’s teaching provoked many investigations in the pedagogical field. When complexity due to heterogeneity in a group of students (different levels of skills, curricula and professional experience) is added to disciplinary difficulties, expectations of both students and teachers are necessarily jeopardized. This article propose an evaluation of a pedagogical experiment through Role Playing Game which purpose was to take into account the difficulties coming with students heterogeneity, and to overcome them in a playful and motivating way, considering the specifities of each and everyone within the group.