New Technologies have been incorporated to schools as learning tools some time ago. In this paper we remark some advantages of video games as educational systems and how we can use them as a tool of CSCL (Computer-Supported Collaborative Learning) into classrooms. Moreover, we consider that learning process is important enough to be measured in addition to the solution. So, we are interested in this scope and we present a first step towards our method of collaboration analysis in VGSCL (Video Game Supported Collaborative Learning): a messages categorization.