Good quiz idea, but I think you could polish it up a bit. Is it necessary to require the word "Castlevania" in every single type-in? Surely just typing "Symphony of the Night" etc. should be good enough. Also, it's Aria of Sorrow, not Sorrows. And you missed Harmony of Despair on the Xbox 360 and PS3.
Not bad, although the collections aren't games they are just ports of games already on the list. And putting in 'Symphony of the Night' isn't counting for the Saturn.