Serious Games (SG) have become popular and their efficiency has been proven in numerous domains throughout the years. You can find them for a plethora of subjects, in bountiful forms and consequently, to answer various needs. They are particularly efficient to reproduce concrete situations and to train on specific objectives. However, most of them are only designed for one player. One explanation might be their design that seems indeed more complex for multiplayer SG. This paper focuses on a certain type of multiplayer SG: those based on multirole. Thus, this paper aims at drawing a state of the art of multi-role SG and their design, as a first step to propose a design model of multi-role SG.