Complete the indicated task to unlock the corresponding gamer pic.

Fang: Unlock the "Treasure Hunter" achievement.
Hope: Unlock the "Instrument Of Change" achievement.
Lightning: Unlock the "Superstar" achievement.
Sazh: Unlock the "Loremaster" achievement.
Serah: Unlock all achievements.
Snow: Unlock the "L'Cie Paragon" achievement.
Vanille: Unlock the "Instrument Of Faith" achievement.