Nights - Journey Of Dreams - Platform: Wii

Audio Room:
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Successfully complete Will's story to unlock the Audio Room at the 
Story Select menu.

Sketchbook:
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Successfully complete Helen's story to unlock the Sketchbook at the 
Story Select menu.

Video Room:
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Successfully complete Helen's story with a "C" rank or better on all 
missions to unlock Helen's Video Room at the Story Select menu. 
Successfully complete Will's story with a "C" rank or better on all 
missions to unlock Will's Video Room at the Story Select menu.

Alternate endings and events:
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Successfully complete the indicated task to unlock the corresponding 
alternate ending/event:

Final Ideya: Successfully complete all missions with a "C" rank or 
better with Helen or Will. Then, fight Wizeman a second time.

Helen's secret ending: Successfully complete all Helen's missions 
with a "C" rank or better. Then, fight and defeat Wizeman a second 
time.

Second Reala battle: Successfully complete all missions with a "C" 
rank or better with Helen or Will. Then, go to fight Wizeman a second 
time to first fight Reala a second time.

Will's secret ending: Successfully complete all Will's missions with 
a "C" rank or better. Then, fight and defeat Wizeman a second time.