Here is the full list of all 12 Castlevania: Symphony of the Night achievements worth 200 gamerscore.
Finish the game, including the inverted castle, as Richter.
Defeat Dracula in the Bloodlines stage without getting hit.
Explore 200.6% of the game.
Collect a bank of $100,000.
Unlock/Cast all eight of Alucard’s spells.
Unlock the Inverted Castle.
Collect all five familiars in the game.
Obtain the Bat, Wolf and Mist transformations.
Defeat 10 consecutive enemies using only magic without getting hit.
Defeat 10 consecutive enemies using special weapons without getting hit.
Defeat Gaibon and Slogra.
Defeat 10 consecutive enemies using standard weapons without getting hit.