Here is the full list of all 12 Castlevania: Harmony of Despair achievements worth 200 gamerscore.
Racked up at least 1,000,000 in funds.
Collected 300 different types of items.
Destroyed at least 10,000 enemies.
Completed Hard Mode.
Defeat an ally who has been seduced by the enemy.
Defeated a boss using a Dual Crush.
Destroy the lord of Castlevania.
Defeated a boss using sliding.
Brought a comrade back from the dead.
Jump kicked 30 times in a row without touching the ground.
Defeated an enemy by hitting back a Skeleton's bone.
Defeated a boss with 5 players in skeleton form.