Hmmmm...early RPGs?
I had AD&D and Basic in 1977. As I recall, I got into Traveller in the next year or so, but didn’t own the books until some decades later.
Next came the MicroGames Melee, Wizard and the RPG that spawned from them, The Fantasy Trip/In the Labyrinth. I also picked up a host of other MicroGames/Steve Jackson Games- O.G.R.E., G.E.V., Car Wars, Helltank, Hot Spot and others. plus similar mini games from TSR and Task Force Games. Star Fleet Battles and Starfire also joined my library, along with a few Avalon Hill games. Somewhere in there, I picked up the card game, Nuclear War.
I picked up Champions as soon as it hit the shelves, and bought every edition after that (except Fuzion). And I got the first edition of Stormbringer.
And that was pretty much it for a decade or so. I bought revisions or expansions of the games I owned, but didn’t continue to expand my horizons.
Then I kinda went RPG crazy 1990-1994, adding to the collection quickly and broadly. Eventually, the collection hit over 100 RPGs, dozens of board games, and M:tG (plus a couple other CCGs),