T. Foster said:
Judges Guild was selling D&D modules with the D&D logo on them,
However, that only lasted a few years of new modules. In the very early 80's JG went to "generic."
Runequest actually had very, very few true "modules." There are really only three (Balastor's Barracks, Apple Lane and Snake Pipe Hollow). Everything after that was part adventure, part something else.
Griffin Mountain: It was sort of an adventure, but in reality it was a rich campaign area with all sorts of adventures and adventure seeds included.
Borderlands: Perhaps the first "adventure path." It was a series of adventures set in a "Keep in the Borderlands" type area. This is probably the last true adventure product for Runequest, but it is a very large part source book.
Big Rubble: Half of a setting book really. It just happens to be the half of the setting that's an abandoned city full of module type adventures.
Looking at it, I think what happened is as RPGs developed, customers realized they wanted more. IMO, very few products have come close to reaching the level that
Griffin Mountain hit in the very early 80's. Once RPGs released a top quality product that was part adventure, part something else, than straightforward adventures became less "shiny."