|This page is rather stubbly and could use some expansion.|
Are you a bad enough dude to
There are some unused music tracks and a small amount of unused graphics inside the ROM as well.
Metal Force is a platformer that's similar to Mega Man, but with no powerups. It uses the Konami sound engine from Tiny Toon Adventures.
A unused set of tilemaps can be found near the staff roll tilemaps in the ROM. Oddly enough, they consist of various popular song titles, mostly by Eric Clapton. It seems that the developers either planned to list the original songs that were arranged for the game's soundtrack, or were going to include a sound test.