All of these would be 3-D.
Castlevania: Cataclysm
Mathias shortly before the events of Dracula's Curse. The game begins with a prologue where Al witnesses the execution of Lisa. After her death, Mathias begins to build his unholy juggernaut. He defeats a group of other vampires and demons who stand in his way (they'd rather enslave and oppress humans than destroy them since that benefits them more. Drac has no interest in this since his is a quest of revenge). During the game Mathias travels around the world, acquiring some of his primary servants, such as Minotaur and Medusa.
The game ends with a cliffhanger with Drac assuming control over the castle. The remaining members of the order begin plotting their revenge against Drac.
Gameplay: employing Drac's spells, vampire abilities and devil forgery.
Playable characters: Mathias/Dracula, St.Germain, Belmont (Trevor's dad?)
Castlevania: Dethronement
The same organization Drac almost wiped out is back. Between Dracula's Curse and SotN, they succeed in stealing Drac's castle from him, literally throwing him out. A powerful demon (the new "right hand of Chaos") is summoned. Unbeknowst to the order, the creature's presence starts interrupting the barrier between the Chaos realm and the world and the only way to reverse the effect is to kill it and give control back to castle's rightful owner, Dracula.
St. Germain, being a time traveller, travels back to this
time and manipulates a Belmont, Alucard, various supernatural mercenaries and the disguised Dracula to take care of the situation. The game chronicles Drac regaining his powers to kick his unwanted guests out and Alucard struggling between his feelings of hate towards humanity and the promise he made to his mother. The Victor-like Belmont in this game also secretly spurns his life as a recluse caused by the people's fear of his powers and the heavy responsibility that comes with the Belmont name.
Playable characters: Belmont, Dracula, Alucard
Castlevania: The Oblivion Signet
The battle of 1999. Explains how the castle was sealed away and Drac was freed of his resurrections.
Playable characters: Julius Belmont, Alucard etc.
Castlevania: Epilogue of Sorrow
Playable characters: Soma, Alucard, Yoko, Julius's son, Grant's descendant
The final chapter of Soma's story. Will he eventually become the Dark Lord or will someone else assume that title like Alucard believed?
Castlevania: Purgatory
Remake of Simon's Quest. The curse starts eating through Simon, but also ables him to use some spiffy dark powers, which, when overused, result in negative consequences and/or affect the ending.