Age of Ravens: History of Licensed RPGs (Part II 1984-85)
This post looks at couple of early gaming years and the dozen new licensed properties which emerged. Most of these had solid support from their company, but many burned out within a year or two. For example FASA’s Dr Who rpg had a huge number of supplemental products but was dumped two years later.
Check it out and if you dig it, I have links to the rest of my list series covering Horror, Post-Apocalypse, Steampunk, and more.