Successfully complete Mitsurin Jungle to unlock Challenges 1, 2.
Successfully complete Mokuzu Depths to unlock Challenges 3, 4, 5.
Successfully complete Sunahara Desert to unlock Challenges 6, 7.
Successfully complete Hibashira Plains to unlock Challenges- 8, 9, 10.
Successfully complete Sekihi Belt to unlock Challenges 11, 12, 13.
Successfully complete Sekai Outpost to unlock Challenges- 14, 15, 16.
Successfully complete Chuuroh City to unlock Challenges- 17, 18, 19.
Successfully complete Zenshoh Station to unlock Challenges 20, 21 ,22.