Everyone has a favorite song or entire soundtrack from games they've played countless times in the past. This isn't a thread about those though, it's for the music in the ones they've never even played one second of. This isn't my complete list but it's enough to get this thread started.
The Neverhood: I didn't own a PC when this game was originally released so I hadn't heard about it until several years ago. I do own a used copy of its sequel Skullmonkeys on the Playstation though and I very much enjoyed the soundtrack so I tracked down the first ones and to no surprise it was just as awesome.
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Erik the Viking: I suspect no one has ever played this game because it was never even released. It's an NES game based on the 1989 film of the same name which itself was based on a book written by Monty Python alumi Terry Jones who also directed the movie. Eurocom the company behind the game went under and the game was obviously scrapped but the soundtrack was released a few years ago by the actual composer Neil Baldwin.
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New Ghostbusters II: I own the GB port but the NES port was never released in North America and the music is completely different. It contains cool 8bit verisons of some songs from the movie like "Flip City".
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Tintin: Prisoner's of the Sun: A Tintin game that was never released stateside. An SNES version exists but this is from the GB/GBC port.
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The Smurfs: The NES version of the game released by Infogrames which was also not released here but even if it were I doubt I'd have gone near the damn thing. Which makes its great soundtrack even more surprising although this game and TinTin have one thing in common and that's it's composer Alberto Jose Gonzalez.
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Mr. Gimmick: An NES game only released in Japan and like one single country in Europe. It's from Sunsoft so you know the music is going to be great but this one is really unique since the Famicom version contained special sound chips which really enhances the music
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Ganbare Goemon 2: Most of the soundtrack was composed Michiru Yamane which is apparently her first. My favorites are at the 7:25 and 9:32 mark.
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Goemon Kuru Nara Koi! Ayashi Geikka no Kuroi Kage: An apparently lackluster Goemon title for the Playstation that has four very awesome battle themes during the different Impact boss battles.
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