Talk:World 1/@comment-122.108.253.40-20140906164039/@comment-25085594-20140908061546

Extra Op maps like 1-5 or 2-5 rewards medals for raping the boss monthly. Said medals allow you to exchange for resources (which nobody does, if rarely) or blueprints, which are required to remodel certain ships like Tone/Chikuma, Bismarck, Taigei into stronger Kai models.

Aside from some rare ship drops on those maps, it also helps boost your server ranking if you're aiming for the top spots, and if you're after the monthly ranking rewards.