We won't know until 3 to 4 years after the release of the game. Earthbound's legacy was established after this period, as the game that beckoned its players back into her bosom with a loving embrace. It was only after I had played countless other rpgs that I remembered the love and compassion this game gave me every time I switched on the snes.
A specific game, I know not
Fact: Earthbound is the greatest game ever made