Metroid: Eternal Darkness
Original title: Metroid
Platform: Nintendo Entertainment System
Region: USA (Update Hacks)
Media: Cartridge
Controller: NES Gamepad
Genre: Platformer 
Gametype: Hack
Players: 1
Hacked by: Vandal's Hacks
Version: Patch v0.50
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This Metroid hack contains entirely new levels, new enemies, new palletes, etc.

http://www.zophar.net/hacks/nes/metroid-12/Metroid-Eternal-Darkness-197.html