Double Dragon began as a 1987 arcade beat ’em up developed by Technos Japan and distributed by Taito, a spiritual successor to Technos’s earlier Nekketsu Kōha Kunio-kun that added two-player co-op and the ability to pick up and use a disarmed enemy’s own weapon, quickly becoming one of the genre’s foundational hits. Technos ported the game to the NES itself, releasing it in Japan in April 1988 and, via North American publisher Tradewest, two months later. The NES conversion made some significant changes to fit the hardware and reshape the experience: true simultaneous two-player co-op was dropped in favor of alternating turns, Jimmy Lee was removed as a playable character and turned into the game’s final boss, several enemies and levels were reworked or replaced, new platforming-focused sections were added, and only two enemies could appear on screen at once due to memory limits. Despite those changes, players still fight their way through the Black Warriors gang across a series of side-scrolling city stages using punches, kicks, and improvised weapons to rescue Marian, and the NES version’s distinct spin on the arcade formula has its own dedicated following separate from the coin-op original.