Double Dragon (ダブルドラゴン, Daburu Doragon?) is a 1987 beat 'em up developed by Technōs Japan and distributed in North America and Europe by Taito Corporation. The game is a spiritual and technological successor to Technos' earlier beat 'em up, Nekketsu Kōha Kunio-kun (released outside of Japan by Taito as Renegade), but introduced several additions such as two-player cooperative gameplay and the ability to arm oneself with an enemy's weapon after disarming them. Double Dragon is considered to be one of the first successful examples of the genre, resulting in the creation of two arcade sequels and several spinoffs, as well as inspiring other companies in creating their own beat 'em ups. Home versions of the game were released for the Nintendo Entertainment System, Sega Master System, Atari 2600, Atari 7800, Atari ST, Amiga, Amstrad CPC, Commodore 64, Game Boy, Genesis/Mega Drive and Atari Lynx, among other platforms during the series's height of popularity. A remake titled Double Dragon Advance was released for the Game Boy Advance in 2003. The NES version was re-released for the Wii's Virtual Console in North America on April 28, 2008 at a cost of 500 Wii Points. Nintendo also released the Game Boy version on the Nintendo 3DS Virtual Console in 2011. Another remake was released for the iOS mobile devices in 2011, which features brand new gameplay, sprites and animations, and music. A new Double Dragon title, Double Dragon Neon, was released in 2012 for Xbox Live Arcade and PlayStation Network, and in 2014 for Steam and is considered a reboot of the series.

Double Dragon V: The Shadow Falls is a 1994 American-produced sequel to Technōs Japan's Double Dragon series. Unlike the previously produced Double Dragon games, Technōs had little or no credited involvement in the development of the game outside of licensing the series' name to publisher Tradewest (the publisher of the first NES version of Double Dragon and the Super NES title Super Double Dragon). Instead, the game was developed by Leland Interactive Media, a subsidiary of Tradewest. Unlike the previous games, which were side-scrolling fighting action games or beat-em-ups, Shadow Falls is a head-to-head fighting game based on the animated Double Dragon TV series in the style of Capcom's 1991 arcade-hit Street Fighter II. Technōs would later produce its own fighting game based on the Double Dragon movie the following year simply titled Double Dragon for the Neo Geo. Shadow Falls was originally released for the Super NES and Sega Mega Drive/Genesis, and later released for the Atari Jaguar by Telegames (publisher of the Atari Lynx version of the first Double Dragon) in 1995.