Online games have had a noticeable in crease in the market. Today, many people interact for hours in a virtual gaming world called the Massive Multiplaye r Online Role-Playing Game (MMORPG). Players maintain relationships and build large communities, which are formed by diverse people who establish links in very different ways. The research analy zed the development of these communities through the application of the graph theory and the elements that pertain to social network analysis. For this matter, a study was made with the players of the Ragnarök Onlin e, brought to Brazil in 2004, where the profile of the player, the game’s workings and its communication elements were all taken into consideration.