Serious Games (SGs) offer advantages for learning but yet, their use in classrooms is still very marginal. The design of SGs by teachers themselves seems to be a viable solution to develop their use since they are in demand of training on the subject. However, the creation of SGs ideally involves the close collaboration of several experts: pedagogical experts (teacher), game designers, graphic designers and developers for digital SGs. However, schools rarely have the means to hire such teams and teachers find themselves leading this project alone. What advice can be given to these teachers? In this paper, we propose the 10 commandments of the SG padawan, based on our experience in training more than 86 teachers in higher education on the subject and accompanying them in the creation of 21 digital and non-digital SGs.