The relationship between the obsessive-compulsive disorder and the gaming disorder is investigated. A total of 345 undergraduates completed a survey that included demographic information, responses to the obsession-compulsive inventory-revised scale and the internet gaming disorder test. While initial findings showed the obsessive-compulsive disorder can predict the gaming disorder, deeper probe carried the potential of changing how this relationship is conceptualized. Only the checking subtype predicted the internet gaming disorder within the disordered gaming group. A corollary to this finding is that symptoms of the checking subtype of the compulsions component can predict having gaming disorder. Also, there was a significant strong association between a counting symptom and the internet gaming disorder scores of the disordered gaming group. This study indicated that the identified significant impact of the obsessive-compulsive disorder on the gaming disorder is rooted in shared mental functions by a gamer.