This document discusses integrating a serious game into a MOOC on sustainable mobility offered by IFP School to improve student motivation and learning. A serious game was developed where students took on roles like a refinery manager and solved industry problems. This allowed students to apply concepts from lectures in a fun, interactive way. Integrating the game technically with the MOOC platform was challenging but successful. The MOOC saw higher completion rates than average (31% vs 10%) and more young students (49% vs 15-19%), indicating the game was highly engaging and effective for learning. Student feedback confirmed the game improved understanding by allowing practical application of concepts in a low-stress environment.