Recently, the issue of problem online video game playing and its potential connection with problem gambling has drawn increased attention. Although conceptually similar to many behavioral addictions, there is still no clear consensus on how to best measure and assess problem video game playing. This study validates one proposed measure of problem video gaming—the Problem Video Game Playing Test (PVGT)—in a Canadian undergraduate university student sample. Multivariate results indicate that problem video gaming is positively associated with the average length of time spent gaming, social alienation, and online gaming motives such as competition, escape, coping, recreation, and socializing; but, contrary to the gateway hypothesis, problem gambling and several of its mental health correlates—depression, anxiety, and stress—are not associated with problem video gaming as measured by the PVGT. Limitations and implications of this analysis are discussed.