Fire Emblem: Fortune's Weave lets you clear the whole game by playing just one route — or none at all if you're a real sicko and ignore the Flame Lords. But you really, really should do at least two routes before tackling the final campaign against Balor. Clearing a second route is faster and slightly less grueling than your first route, and you've got more opportunities to recruit more characters, which you'll need in the final battle.