I recall vaguely "playing" Dragon Warrior on the NES on my father's lap as a wee lad, aware that my actions had any impact against the cartoonish slimes on the battle screen only through excessive encouragement and jubilation.
As an actual gaming experience that I could muster on my own, though? Final Fantasy IV, known to me then as Final Fantasy II. I credit that game, more than anything, with kick-starting a love of both RPGs and strange and archaic turns of phrase. ...I'm shocked I turned out as well-spoken as I am.