Only a few games have truly been addictive for me. Most games I play give me the feeling of wanting to have another go, but these ones are the ones I just could not put down and could not stop thinking about:
WoW, of course, 45 days logged on my main, though I've kicked the habit and hardly play it anymore.
Dance Dance Revolution - got into it by accident, then quickly got into the habit of trying harder and harder songs and practising until I beat them. Within a year I was competing in national tournaments. I don't play it much now, but it carried on for a good two or three years.
Deus Ex - hooked until the end, staying up until 3am some nights.
Final Fantasy VII.
WoW, of course, 45 days logged on my main, though I've kicked the habit and hardly play it anymore.
Dance Dance Revolution - got into it by accident, then quickly got into the habit of trying harder and harder songs and practising until I beat them. Within a year I was competing in national tournaments. I don't play it much now, but it carried on for a good two or three years.
Deus Ex - hooked until the end, staying up until 3am some nights.
Final Fantasy VII.