CONCLUSION: In the present study, ADHD was the psychiatric comorbidity most significantly associated with GD, followed by depressive disorder and GAD, as previously reported for IGD. ADHD was also associated with HG. Depressive disorder was more associated with GD compared to HG. Intervention for HG and GD should be tailored by the consideration of the clients’ psychiatric comorbidity as well as their reappraisal skills, impulsivity, aversion sensitivity, and fun-seeking.