Why does Zelda sell so well outside of Japan? One word answer:
Nostalgia.
Zelda like all great series does not differ from the original formula that made it a phenomenon. In each Zelda game you can expect an overhead world, dungeons, Link starting with laughable gear, master keys, compasses, maps, and the dungeon treasure.
This familiarity is beloved in the West where we are inundated with gritty games with heavy mature content. Players need a light-hearted game that takes them back to the innocence of their youth. Playing Zelda is basically going back into a time machine into that magical period when you were 8 to 14 years old.







