The study is designed as a two-armed randomized controlled trial. After inclusion, every participant will be offered social mapping (overview of the participant´s social circumstances) and a review of the participant´s general health (e.g., other addictions, physical activity and dietary habits). Thereafter, the participants will be randomized to one of the two arms.~The main arm includes individual CBT treatment following a new, module-based manual. The manual includes ten weekly sessions addressing different dimensions of gaming disorder, for example thoughts, emotions, and procrastination. Between every session the participants have home assignments to work with, in order to strengthen helpful behaviours. The participants also report amount of time spent on gaming and other activities every week.~Participants randomized to the control arm also report their time spent on gaming and other activities every week. In connection to the registration of gaming time, they also receive short, interactive psycho educative messengers. The control treatment has the same duration as the main arm. Participants in this group will then be offered the same treatment as participants in the main arm.
For most people, gaming is perceived as a positive activity. In some cases, however, gaming may turn into an addiction with consequences for the individual health, quality of life and everyday life. Today, there is a lack of evidence-based interventions to treat this condition, called Internet Gaming Disorder (IGD). This study will evaluate a new manual for treatment of IGD, divided into a number of modules and based on cognitive behavioural treatment (CBT). The study is designed as a randomized controlled trial (RCT) and will be conducted at a clinic specialized in the treatment of gambling and gaming addiction.~Participants included in the study will be randomized to one of to groups. The intervention group will receive ten weeks of individual CBT-treatment while participants allocated to the control group will be offered a number of short weekly interactive psycho educative sessions.~The hypothesis is that the manual based CBT treatment will result in a greater reduction in number of hours spent on gaming and number of criteria for IGD.