An expected increase in the number of older people with mobility problems will bring more concerns to the health professionals. One way to help both, professionals and patients, can be found in the development of serious games oriented to motor rehabilitation in physical therapy sessions. Optimization of game management, collection and processing of information, which are the health professional responsibility, can be achieved with the integration of a Back Office system in the game. Therefore, this article aims to present a modular system of Back Office, for centralized management of one or more games targeted for physical therapy.