Vampire Killer (all versions)
Haunted Castle
Castlevania
Castlevania II
Castlevania III: Dracula's Curse
Castlevania Adventure
Castlevania II: Belmont's Revange
Castlevania Legends
Super Castlevania IV
Dracula X: The Rondo of Blood
Castlevania: Bloodlines
Castlevania: Dracula X/Vampire Kiss
Castlevania: SOTN
Castlevania: Legacy of Darkness
Castlevania: COTM
Castlevania: HOD
Castlevania: AOS
Castlevania: LOI
Castlevania Chronicles
Yeah that's all of them. The only one I haven't played is the original version of the Chronicles game. Although, that version is featured in the "remake" so technically, I have played it.