User blog comment:Master Sima Yi/Assassinews 10-07-'13 — Assassin's Creed IV: Black Flag pirate gameplay naval exploration/@comment-4975789-20130710231057/@comment-4829046-20130713065254

Not to mention that achievement you unlock for uncovering more than 75% of each map >_> which require you to leg it around all the black spaces that are away from viewpoints. That was annoying. More annoying if you didn't realize that you only need 75% since the description hints at 100%.

And I'm glad I'm not the only one who follows the sensible route.