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.