One of the things that makes it difficult to collect software and games for the C64, after all of these years, is knowing who published which games. Although there are some great on-line games databases today, not all C64 games are listed (even today) - nor do the publishers seem to match. This was the case for the games published by Thunder Mountain.
In my collection of games on floppy disk, I have a few published by a company called, Thunder Mountain. When I began looking for other games published by them, I could find very little. Even stranger, some of the games that I have on disk, which I could find on on-line databases, were also showing up under other game publishers. I could not figure out as to why these games were under different publishing companies.
Finally, I was able to piece together that some of these game publishers did business under different names. They did this for branding purposes, re-distributing games under “discount” labels - kind of like the way grocery stores sell products made by brand name producers under their “no-name” brand at lower prices.
The first games publisher that I learned did this was Mastertronic. I therefore came to the conclusion that Thunder Mountain was a discount label, too. But, who was their parent company? I couldn't determine that with the games I had in my collection, nor what I could find on-line. But then, one day I stumbled across a write-up on the Personal Computer Museum.
According to them, Thunder Mountain was the discount distributor for Mindscape Inc. and only published a limited number of games from 1986 through to 1989.
So, there you have it; the mystery of Thunder Mountain has finally been solved.