Dragoon - 9999 Score in Kain's minigame
Goblin outfit - Clear the main story twice
Ninja - 9999 Score in Edge's minigame
Paladin - 9999 Score in Cecil's minigame
Summoner/Black Mage - 9999 Score in Rydia's minigame
White Mage - 9999 Score in Rosa's minigame
Zeromus outfit - Complete your Bestiary 100%