The present data set involves online survey/scale data of anonymous/de-identified adult players of massively multiplayer online-role playing with residency in Australia, the USA, the UK, Canada, and New Zealand [N = 1032 Mage = 24, SDage = 7, males = 503 (48.7%), females = 529 (51.3%)]. The estimated maximum sampling error (at the 95% confidence interval) for 1032 participants is 3.11%. Participants provided informed consent for the use of the data for future research purposes by researchers other than the collection research team. Measures included in the present base involve: a)The Individualism and Collectivism Scale/Culture Orientation Scale (ICS; Triandis and Gelfand, 1998); b) The Depression Anxiety Stress Scale (DASS-21;Lovibond & Lovibond, 1995); c) The ADHD Self-Report Scale (ASRS; Kessler, 2005); d) The Internet Gaming Disorder Scale-Short Form (IGD9-SF; Pontes & Griffiths, 2015) and; e) socio-demographic and Internet Use/ Internet Gaming information.