Serious games are becoming an increasingly used alternative in technical/professional/academic fields. However, scenario development poses a challenging problem since it is an expensive task, only devoted to computer specialists (game developers, programmers...). The ultimate goal of our work is to propose a new scenario-building approach capable of ensuring a high degree of deployment and reusability. Thus, we will define in this paper a new generation mechanism. This mechanism is built upon a model driven architecture (MDA). We have started up by enriching the existing standards, which resulted in defining a new generic meta-model (CIM). The resulting meta-model is capable of describing and standardizing game scenarios. Then, we have laid down a new transformational mechanism in order to integrate the indexed game components into operational platforms (PSM). Finally, the effectiveness of our strategy was assessed under two separate contexts (target platforms) : the claroline-connect platform and the unity 3D environment.