Talk:Expedition/@comment-193.52.198.110-20150924114015/@comment-26460664-20150924120727

Ah, for that, you must first complete expedition 19. Refer to this page : (http://en.kancollewiki.net/wiki/Expeditions ) - It states that 'completeing an expedition will unlock the next one in numerical order'.

Therefore you have to clear 19 to unlock 20.