In order to unlock the bonuses, these items must be obtained before completion of the game:
Credits section - View any ending
Extra content - View any ending
Card illustrations - Have the Revelations of Pantheon from level BF47
Character illustrations - Have the Hand mirror of Utsmi from level BF18
Item picture book - Have the item book from level BF39
Sound mode - Have the old music box from level BF28
Yggdra war chronicles - Have the Lithography of Mesara from level BF44