As part of playing through Final Fantasy XIII, there will be times that you will be able to unlock Special Themes for the PS3 or Gamer Pictures for the XBOX 360 version. There are a total of seven themes / gamer pictures that can be unlocked and obtaining them will require that you have a special trophy achievement unlocked.
To access the Unlocked Themes or Gamer Pictures, you can go via the Extras menu in the Title Screen of the game. From there, you go ahead and download it.
BONUS THEMES / GAMER PICTURES
– Requires to unlock the Superstar Trophy or Achievement
– Requires to unlock the Loremaster Trophy or Achievement
– Requires to unlock the Instrument of
Fate Faith Trophy or Achievement
– Requires to unlock the L’Cie Paragon Trophy or Achievement
– Requires to unlock the Treasure Hunter Trophy or Achievement
– Requires to unlock the Instrument of Change Trophy or Achievement
– Requires to unlock ALL of the trophies or achievement