A slang word which means someone addicted to playing video or computer games.
It can't be nerd or geek because those expressions denote the person may indeed be eccentric, a loner, and obsessive but nevertheless possess a certain expertise in the field of technology and/or a passion for things hi-tech in general.
I would like a word for someone who continually plays online or computer games until the small hours. I was thinking of midnight gamer or RPG fanatic, but obviously they're not idiomatic. Wikipedia's Role Playing Game terms didn't prove to be very helpful.
And I would also like to know if an equivalent term for a middle-aged man or woman exists, for example a house-wife who has only recently caught the computer-playing bug because her own children play video games.
I did look at this question and although I quite like the term, mouse potato, and it's fairly accurate, it doesn't quite convey the obsessive and compulsive element I had in mind.