I read some time ago that it has been researched (MS was involved) what makes videogames addictive - but to make them more addictive (either they did not deny it or there was other proof, I don't remember). This is why games like Diablo and others work so well: most of the content is generated randomly so you find new things and you are always rewarded with new items and stuff, to keep you going. Gamerscores, game achievements or how you call them on Steam, Live, PSN work the same way. They even combine it with Facebook, which can be very addictive itself. There also seem to be genetic causes (for internet addiction; I guess you could count internet games though): http://www.eurekalert.org/pub_releases/2012-08/uob-ia082912.php Luckily I am not game addicted, though I like games: I can see that I play less with increasing age. As a teenager I played most time of the day. Today I don't like most of the current games, already know my beloved old ones (and also know that I would have to read million lines of text if I'd really play my RPGs again) and want to relax in other ways. I see no point in achievement hunting, social networked gaming, internet gaming with strangers or even (private) LAN parties. Gaming has no purpose except "wasting" time. So mostly I play something like a quick computer card game and then do other stuff again. If I really want to play I mostly play about 1h tops (1-2x a week), I am tired after that and stop it. I seldomly play for several hours and almost never play into the night because the next day is wasted from the beginning, like from a hangover.