Double Dragon 3: The Rosetta Stone is a side-scrolling beat 'em up. that was originally released as a coin-operated arcade game in 1990. It is the second sequel to Double Dragon for the arcades, following Double Dragon II: The Revenge. A Nintendo Entertainment System game loosely based on the arcade version was released, along with conversions for the Sega Mega Drive/Genesis, Game Boy, and various computer platforms. The premise of Double Dragon 3 is explained on the game's attract sequence: while returning to their home from a training trip, Billy and Jimmy Lee cross paths with a fortune teller named Hiruko. The fortune teller cryptically tells the brothers that they must collect the three "Rosetta Stones" scattered around the world in order to face a mysterious new adversary awaiting them in Egypt. Depending on the game's configuration, up to two or three players can play the game (similar to The Combatribes, another beat-'em-up by Technos released during the same year). As usual, the first two players take control of Billy and Jimmy in that order, while the third player assumes the role of Sonny, a yellow-clad palette swap of the Lee brothers.