It exists, I found it, and it's here. The official soundtrack to Interstate '76, which I have searched for on and off for 10 years has been unearthed. For some context, you can check out some old posts. I once wrote "I would kill for this soundtrack, though it may be lost for eternity." Luckily, I did not have to commit murder nor was the soundtrack lost forever. Strangely enough, I was scouring google to find that finale music from the classic SNES game A Link to the Past (perhaps one of the most satisfying game endings I can think of), when I came across the Galbadia Hotel, the most insanely overwhelming, comprehensive collection of video game soundtracks (and anime soundtracks) imaginable. I literally spent a couple hours lost on that site listening to old songs from Lemmings, Worms (I love that that theme!), old music from NHL '99, Lupin III soundtracks... it goes on and on. Anyway, I'm thinking "Well, they've got so many soundtracks, but there's NO WAY they have Interstate '76." So I see a link to "Interstate '7 Official Soundtrack," but I'm still skeptical and think it's gotta be just a rip of the original game CD. Then I see the 32-track list (all with titles) and I am shocked and awed.
Now I realize 95% of you so-called readers will not be as mind-blown as I was, but I know that I am not the only one obsessed with this soundtrack. So now me and a very very small percentage of the world population can breathe a collective sigh of relief. AHHHHHHH. Here it is, the Jesus' tomb of late 90's computer game soundtracks:
Interstate '76 Official Soundtrack
On a bittersweet note, almost all the songs on the soundtrack have been heard before. But now they've been infused with sound effects and game dialogue (evidence of a quick cash-in, perhaps?). The most curious track is Macademia Medley, which is a 5 minute mish-mash of old songs and never-heard songs. For the sake of completeness, it's nice to finally hear this whole soundtrack anyway.