" 
 * Yes, it's exactly as stupid as it sounds: a mecha shaped like a woman, complete with breast projectiles (ugh...). True, Double Dragon and Golden Axe are beat'em-ups, but I was talking about two specific modes in each of them where you face the second player in one-on-one combat in a way that is extremely similar to fighting games. Borderline cases, sure. I mostly brought them up for completeness' sake. Onna Sansirou and Yie Ar Kung-Fu II does have elements of what is now considered beat'em-up, but I would say that's more because the genre convetions were not as clearly defined back then. The ""beat'em-up"" sections of Yie Ar Kung-Fu II are extremely short, more like intermissions if anything. The meat of the game is still the one-on-one fighting, and the two-player mode is strictly traditional one-on-one fighting. In Onna Sansirou, while you face multiple lesser opponents before fighting the ""real"" opponent, you only fight them one at a time and you stay in the same arena. Beat'em-ups typically have you face multiple opponents at a time and have you move ahead in a progressing level.   "