Talk:World 4/@comment-108.49.70.31-20160114020825/@comment-122.152.131.50-20160114021613

Are you sure 4-4 is cleared? That map has a health bar and the entire bar has to be cleared (4 flagship of the boss node sunk) for the entire map to be cleared to unlock 5-1. Also check if 3-4 is cleared as world 5 needs both world 3 and world 4 cleared to be unlocked.