Massively Multiplayer Online Role Playing Games (MMORPGs) attract millions of online gamers all over the world. However, very few studies have addressed the nature of participants in these games through a robust theoretical background. Thus, the need for theory-based attempts to understand the characteristics of players in different contexts is urgent. The current study adapted a contemporary scale on gamer motivations with Turkish MMORPG members. Confirmatory factor analyses with 307 Turkish MMORPG players revealed that the scale worked effectively. Furthermore, the proposed factor structure and the structural equation model sheltering the interrelationships among the motivation components were supported with a theoretical background on the Self-determination Theory (SDT). It was observed that Turkish MMORPG players were mostly non-working and young males who demonstrated unique playing patterns. Their playing time was correlated with the level of education, body mass index and age. Advancement in the game, game mechanics and socializing were the leading motivations whereas teamwork has been given less importance. The study also revealed that the autonomy, competence and relatedness needs which are proposed by the SDT are not mutually exclusive components. Findings were discussed followed by implications and suggestions for further studies.