The DSM-5, the most current manual detailing diagnostic criteria for mental health disorders, includes a controversial section on Internet Gaming Disorder. It is described as “a condition warranting more clinical research and experience before it might be considered for inclusion in the main book as a formal disorder.” Current research indicates that, like substance use disorders, excessive gaming can lead to depression, anxiety, and other symptoms. The idea of video game addiction is still fresh and seen by the general public as a moral issue of self-control as opposed to a disease, but the tone may change as more data emerges.
http://www.kmtv.com/news/local-news/special-report-games-of-addiction