Dead or Alive 2
A popular and commonly discussed feature, one credited to Itagaki, was the level of graphical detail Tecmo put into the animated breasts of the female characters. Tecmo went so far as to create a physics engine dedicated entirely to the animation of the female characters' breasts. This feature boosted the overall popularity of the game with its primarily male audience, especially in Japan.
Model Number(s): Dead or Alive 2