E-sport gradually reached large masses and is consuming a great deal of time and circulation of money. Literature shows us that there are relationships between online gaming and various psychological factors. Especially the relationship between online gaming and aggression was widely studied. Alienation and emotional intelligence were also treated as potential mediators on the relevant relationship. The literature has not properly come to an agreement on the direction of the relevant relationship, moderators and mediators, so far. Therefore, this study aimed to investigate the possible predictions based on online gaming habits and perceptions of online gaming for aggression, alienation and emotional intelligence. A sample of 316 online game players completed the online gaming habits and perceptions questionnaires, Buss-Perry Aggression Scale, Dean’s Alienation Scale and Emotional Intelligence Scale. Results have shown that none of the aggression types were predicted by neither years nor daily hours of playing online games. Additionally, perceptions and habits predicted different dimensions of aggression, alienation and emotional intelligence diversely. Our results indicated that, the observed relationships are rooted from how players perceive the game and the degree of their socialization within the game, rather than mere exposure to online games. This study provides a new insight by putting forward the individual perspective in scope of effects of online games.