Talking about MMORPG's and their life utility is necessary to make forced reference to the expansions, that if already in the successfull single player tittles they receive a great importance and generally get to have just one, in this type of games become more numerous and importants. This type of applications allows to remarkably extend the life of a MMORPG but they also suppose an additional cost for the users and not always their results in the quality of game finish being positive but that can arrive to disappoint or to destroy the gameplay completely.