Over at Hally's Vorc.org chiptune music blog points out that the Project EGG digital music store he's involved with has has started distributing a "very rare soundtrack from the unreleased arcade game "Tokeijikake no Aquario"."

He further explains: "Weston, the game company known with "Wonder Boy" series, has developed this game in 1993. It was almost completed, but never released due to the poor result of the location test. Some people say it was not a bad game at all, but 1993 was the worst year for such a "Monster Lair" style scroller as the interest to "Street Fighter II" and [similar titles] were too strong at that time..." Did anyone ever dump this for MAME emulation, I wonder?

The actual album, which is digital-only, is 1890yen ($16), though it does include remixes from popular chiptune artists Shogun, USK, and Blasterhead, which is an awesome idea. However: "Unfortunately the service doesn't accept any orderings from outside Japan. But at least you can listen to previews from all tracks." Hopefully someone will Westernize this service (maybe at slightly cheaper rates?) soon, because it'd be fun/neat to get legal goodness like this.