In August 2004, the game was released in Japan for download on cellular phones. This version, a port of the original MSX release, includes an infinite ammo bandanna and a "Boss Survival" mode.
The European MSX version edited and removed a majority of the transceiver messages. This included Big Boss' comments on every item and weapon found by the player, a few of Schneider's calls (mostly those regarding Gray Fox's cell), and all of Steve's lines.
Metal Gear, originally on the MSX2, was ported to, and technically, redone for the Nintendo Famicom and its counterpart, the Nintendo Entertainment System, with differences in music and level design. Hideo Kojima was not involved with that project.