Well, not realy addictive, but i got realy into digimon world 2003 , and i wnated to farm all evolutions, i ended having a tic for smashing continually the accept button, i was always farming, seeing a movie, the ps1 controller with a stick in the joystick and i was pushing x continuously, i was studying, the same, my mother swears i was pushing the button while sleeping...and its probably true , the only time i wasnt farming exp was while i was in schooll or in a sport practice