The analogy of “videogame addiction” to gambling addiction is misleading.
Many if not most researchers who support the concept of video game addiction draw an analogy between video game playing and gambling. In fact, much of the research purporting to assess the prevalence of video game addiction--including the much-touted recent study conducted in Singapore --has employed the same questionnaire that is used to assess the prevalence of gambling addiction, changing only the word "gambling" to "video gaming." The analogy may be tempting to people who don't know much about video gaming. From a distance, playing a video game looks a little like gambling at a video screen in a casino. But think of the differences!
Via Daniel Kim, Stewart-Marshall