Talk:Summer 2016 Event/@comment-29617351-20160813124322/@comment-25174240-20160813125010

You just need to clear the map E-1 in order to unlock E-2.

I think I may know where the problem is. You probably noticed that as you damage the boss the hp bar for the map decreases.

However on the final kill, even if you reduce the bar to nothing but the boss is not sunk, the game will not count that as a "map clear".

In short, to "clear" a map. the map's hp bar must be depleted AND the boss MUST be sunk (reduced to 0 hp). So if you reduced the boss to 1 hp, and the bar is empty... sorry game take it as you didn't clear.