The clinical video game addiction test (c-vat 2.0) is a clinical tool for assessing game addiction. In the current study, the c-vat 2.0 was validated in a sample of 32 game-addicted patients aged 12–23 years. The game addicted patients reported spending extensive amounts of time playing video games. The new test fully covers the proposed nine symptoms for internet gaming disorder, as defined in the dsm-5. The c-vat 2.0 identifies 91 % of patients in treatment for gaming addiction correctly, with the proposed cut-off score of 5 out of 9 positive items.