Double Dragon (US set 1), (US set 2), and (US set 3) are different versions of the arcade game Double Dragon released in the US. The variations in set numbers likely represent minor or significant changes in the game's ROM, perhaps including gameplay tweaks, difficulty adjustments, or even different bonus content. The original Double Dragon is renowned for its cooperative side-scrolling beat 'em up gameplay.

Double Dragon (US set 1)

Dottori-Man Jr.