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[creeperton]

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[gadesx]

I heard that if you beat the game you unlock some languages, english, italian or something

here you can see info:
http://eternallandsmanual.com/Sony_Playstation_One_PSX_Category/Games_Starting_with_the_Letter_T_Category/Tenchu_Shinobi_Gaisen_-_Strategy_Guide_Page.html