I don't know whether what I had (have?) meets this WHO definition, but I can tell you that at points in my life, I've had an unhealthy relationship with video games.<p>For me, and maybe others as well, it's about having control over something and feeling a sense of accomplishment, feeling like I'm achieving something. Video games give you that. For a small cost ($20-$50), you can have pure escapism from reality, think about things other than your shitty life and depression and instead feel yourself accomplish goals, achieve success, <i>win</i>. Unlike drugs or alcohol, it doesn't end- you can just keep coming back without paying anything. There's no chemical hangover, no blood test for it, no social stigma like drugs have. It's perfect.<p>My underlying problems have been dealt with now, but I still have to limit how long I play games for. The high is still there and I recognize it well. I just don't <i>need</i> it like I once did.<p>Looking back at my high school days, I had a good friend who was into drugs. I got him into EverQuest. I wish he'd gotten me into drugs instead- there are well understood paths out of drug addiction. And that game messed the both of us up.