Man, that was too long ago to remember! lol But I think it might have been Super Mario Bros. or The Legend of Zelda for the NES.
^ This.
I was like 3, we had an Atari 2600, an NES, and an Intellivision, all working and available up until I was about 7 or 8. Then the SNES and N64 happened.
Aaaand my parents had at least 100 games just for the NES that I'm aware of. They got a lot of "obscure" titles from trading at flea markets and ****.
I don't even know, lol.
I remember playing Pitfall on the Atari
And I remember SMB 1-3, the first Zelda, Duck Hunt, Adventures of Lolo 1-3, Solstice, Guardian Legend, Kid Klown, Whomp 'Em, Fantastic Adventures of Dizzy, Big Nose the Caveman, Dr. Mario, Kirby's Adventure..
...I really couldn't even guess. I know Guardian Legend and Kid Klown were among my favorites; I remember those the best, so I guess I'll say it was one of those, lol.