At present, medical knowledge is experiencing an exponential growth. This results in serious difficulties to healthcare professionals in keeping up to date. At the same time, medical education is mostly taught using traditional learning methodologies, not always the most efficient. Recently however, there has been a significant increase in the use of computer games for both teaching and training as several published studies are showing that serious games can be more efficient when compared to traditional learning methodologies. Although the current number of serious games used in medical education is still very limited, the authors agree that it's application could lead to the improvement of medical knowledge and skills. This paper describes the serious game Critical Transport which is based on the Portuguese Society of Intensive Care's recommendations for the transport of critically ill patients, as well as the results of a pre/post-test study focused in determining the Critical Transport serious game efficiency as a training tool for training medical students.