Amstrad
Developed by Binary Design and Virgin Masteronic in 1988. The graphics are blocky, and the player characters both have the same color, except Jimmy is a slightly lighter color.
Atari 2600
Devoloped by Activision in 1989. Limited capicity graphics, repetetive music, and very hard controls with only one button.
Atari 7800
Devoloped by Activision in 1989. Graphics are a bit weaker than NES, and has same music as the 2600 version.
Atari Lynx
Developed by Telegames in 1993. Graphics are from the arcade version, but Jeff and Roper are omitted.
Commodore Amiga
Developed by Binary Design and Melbourne House in 1988. All the enemies except Bolo/Abobo and Linda all looked like your character.
Commodore 64
Developed by Binary Design and Melbourne House in 1988, and by Ocean and Technos in 1991. There are 2 versions. The US version has all the characters in the same size, while the UK version has only 1 player.
Game Boy
Developed by Technos in 1990. The graphics are from the NES version, but graphic is monochrome, and all the enemies are almost in the same color.
Game Boy Advance
Developed by Million and Atlus in 2003. Graphics have tweaked a bit, and has some of the enemies and stages from the later games added to this game.
Game Gear
Developed by Virgin Interactive in 1993. This is way different than the other versions, and instead of rescuing Marian, you get to avenge Jimmy's death. The worst version of Double Dragon.
MSX
Developed by Zemina in 1989. Has all the stages from the NES version. No Linda, Jeff, and Willy. Another worst version besides Game Gear.
NES
Developed by Technos in 1988. 2 Player co-op mode is omitted, has Chintai instead of Jeff, and the stages are different than the arcade version. It has has one-on-one fighting mode (Mode B), but when you choose a character, you get to fight with the same character as you.
PC (MS-DOS)
Developed by Arcadia in 1988. The CGA graphics has pink, light blue, and white; while the EGA graphics have nearly all the colors from the arcade version.
Sega Genesis
Developed by Accolade and Ballistic in 1992. It's near arcade port, but the characters and backgrounds have tweaked a bit.
Sega Master System
Developed by Sega in 1988. The graphics are from the NES version, and has all the stages from the arcade version.
ZX Spectrum
Developed by Binary Design and Melbourne House in 1988. While the Spectrum could only display a very few colors at a time (one of which was almost always black) it features large and detailed graphics, considering this limitation. The 48k uses beeps and bloops while the 128k uses all the music from the arcade version.