Rogue Galaxy - Platform: Playstation 2

Ghost Ship: 
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Successfully complete the game and save when prompted. Then, load the cleared 
saved game file to now access the Ghost Ship on the Galaxy map.

Ghost Ship Extreme level:
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Answer all the Seventh Mystery questions in the Ghost Ship to get the Key Of 
The Underworld. Use the Key Of The Underworld to access the Ghost Ship Extreme 
level.

Dolgen Edge:
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Successfully complete the Ghost Ship to get the Dolgen Edge.

Truth Of The King:
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Successfully complete the Ghost Ship Extreme level to get the Truth Of The King.

Alternate costumes:
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Successfully complete the indicated task to unlock the corresponding alternate costume:

Captain's Clothes - Successfully complete the Ghost Ship. 
Kisara's Swimsuit - Successfully complete the Ghost Ship Extreme level.