You can't exactly "beat" a Smash game, but I Brawl is maybe the only one that can count here because of Subspace. I've sunk countless hours into Brawl. Brawl is the reason I am a collector today. It is a special game to me, despite its flaws. BUt one spot where it shined, was in Subspace. That game mode is beautifully done. Those cutscenes are enough to bring a grown man to tears, they're just so good. I've beaten that mode many times and love it every time I play. I only wish that newer Smash's continued with the trend but alas, Brawl is the anomaly.