Kingdom Hearts Birth by Sleep is the sixth game in the series , released in Japan on January 9 , 2010 , and in North America on September 7 , 2010 . It was made for the PlayStation Portable .
Kingdom Hearts Birth by Sleep is the sixth title in the series , released for the PlayStation Portable in Japan on January 9 , 2010 , and in North America on September 7 , 2010 .