Nanostray

Hint: Unlocking challenges:

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

Challenge mode bonuses:

Chuuroh City concept art: Complete Challenge 18
Chuuroh City music: Complete Challenge 17
Enemy 'Masked Raider' model: Complete Challenge 19
Enemy 'Mr. Slater' model: Complete Challenge 10
Enemy 'Squidman' model: Complete Challenge 13
Enemy 'Triple Zero' model: Complete Challenge 5
Enemy 'Whale-Bot 3000' model: Complete Challenge 16
Hibashira Plains concept art: Complete Challenge 9
Hibashira Plains music: Complete Challenge 8
Mitsurin Jungle concept art: Complete Challenge 2
Mitsurin Jungle music: Complete Challenge 1
Mokuzu Depths concept art: Complete Challenge 4
Mokuzu Depths music: Complete Challenge 3
Sekai Outpost concept art: Complete Challenge 15
Sekai Outpost music: Complete Challenge 14
Sekihi Belt concept art: Complete Challenge 12
Sekihi Belt music: Complete Challenge 11
Sunahara Desert concept art: Complete Challenge 7
Sunahara Desert music: Complete Challenge 6
Zenshoh Station concept art: Complete Challenge 21
Zenshoh Station music: Complete Challenge 20

Hint: Unlocking Arcade levels:In order to unlock the levels for Arcade mode you must complete each level in Adventure mode, under any difficulty setting. In arcade mode the difficulty is set at Expert mode. You will only get three ships and cannot change the difficulty.