Internet gaming has become an increasingly popular activity among youth. Internet gaming disorder (IGD) is currently included in the "DSM-5" as a condition for further study. This article discusses the rationale and implications for the proposed disorder's inclusion to the "DSM-5." While IGD is a proposed disorder, it shares similarities with existing, validated diagnoses such as gambling disorder, obsessive compulsive disorder, substance abuse disorders, and addiction. Its association with other psychiatric conditions, including depression and anxiety, has also been documented. The proposed IGD diagnosis is similar to other disorders, yet also unique in several key areas, making it a distinct addictive disorder potentially deserving of its own diagnosis. Although IGD has not been declared an official diagnosis, it is important that school psychologists are informed of the negative effects that can be associated with the chronic, excessive use of Internet games, especially considering that one age group most affected by symptoms that would constitute IGD are adolescents.