Internet Gaming Disorder is now in the DSM-5 and the first inpatient program in the U.S. opened at BRMC to treat video games and gaming addictions.Quoted From: http://netaddiction.com/online-gaming/
"Internet Gaming Disorder is an addiction to online video games, role-playing games, or any interactive gaming environment available through the Internet. Online games such "Grand Theft Auto", "World of Warcraft", the "Dark Age of Camelot", or "Diablo II" dubbed "heroinware" by some players can pose much more complex problems. Extensive chat features give such games a social aspect missing from offline activities, and the collaborative/competitive nature of working with or against other players can make it hard to take a break.Gamers who become hooked show clear signs of addiction. Like a drug, gamers who play almost every day, play for extended periods of time (over 4 hours), get restless or irritable if they can"t play, and sacrifice other social activities just to game are showing signs of addiction"