The Songs of Distant Earth
Artist: Mike Oldfield
This is my favourite album ever. A sweeping, majestic space soundtrack incorporating whale song, Gregorian chant and an African chorus. Although Mike has been accused of copying Engima, the album has a distinctively different feel to any of the latter artist's work (In fact Enigma's third album, which I think is nearest to this one, wasn't released until two years later...).
Some versions of this album come with a CD-ROM section which contains an interactive "game" of sorts. Unfortunately for me, this only works on Apple computers.