Massive Open Online Course(MOOC) is a new development of knowledge learning. Two main models (xMOOC and cMOOC) provide online open education thanks to the wide use of information and communication technologies. The attractiveness of MOOCs is an undeniable fact and the number of participants on institutional websites is very important. Despite this success, the number of learners completing the entire Mooc is very low. In this paper we propose to improve MOOC completion rates by adaptive and playful approach. For this, we propose the use of flexible learning paths and integration with a Serious Game.