It's true that completionist viewers should begin JoJo's Bizarre Adventure with the short Phantom Blood arc, but casual newcomers who want an impactful first impression of can start with Stardust Crusaders instead.

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These completionist challenges take a lot of effort and grinding, so players who complete them can flex on their opponents and show off their hard work.

Source: https://gamerant.com/modern-warfare-3-mw3-how-unlock-arachnida-camo/