This isn't the first Metroid ROM hack that hit the web, but I intend it to be one of the best. Metroid Master has the same engine as the Metroid game for the 8-bit NES, but it has completely different maps. Kudos to SnoBro, who made the MetEdit "level editor" for a game that was never designed to have an editor in the first place!

I realize there might be some thorny copyright issues involved if I gave you the whole Metroid ROM, so I won't. Instead, you can download my self-extracting patcher, which applies my changes to the ROM I assume you already legally possess. Instructions are provided in the ZIP file.

By the way, the self-extractor was built using my new PatchWork tool, which is also free.