Earthbound!
I play so few games, so it's hard for me to come up with ideas. I didn't finish the game in question, so it's not plot-related.
The world of this game is larger than Great Britan, but most of it is lost in fast travelling. You do quests, and there's a plot but the game is too glitchy and difficult so the average person misses out on it.
assuming i'm not the only one who was like that of course