Short answers, pulled from the story.
Warren Ellis created and wrote the Castlevania animated series for Netflix. He was first approached about the project in 2007 by Frederator Studios, despite having no prior knowledge of the Castlevania game series at the time.
The first two seasons primarily adapt Castlevania III: Dracula's Curse, the 1989 entry in Konami's game series. Elements from the 2005 game Castlevania: Curse of Darkness appear from season two onward, and Alucard's backstory is drawn from the 1997 game Castlevania: Symphony of the Night.
Season one premiered on the 7th of July 2017, season two on the 26th of October 2018, season three on the 5th of March 2020, and the final fourth season on the 13th of May 2021.
All four seasons received strong critical scores on Rotten Tomatoes: 83% for season one, 100% for season two, 95% for season three, and 100% for season four. It was the first video game adaptation in Rotten Tomatoes history to receive a Fresh rating.
Graham McTavish voices Vlad Dracula Țepeș in seasons 1, 2, and 4. His performance was consistently singled out by critics as one of the strongest in the cast.
Castlevania: Nocturne is a sequel series that premiered on Netflix on the 28th of September 2023. It follows Richter Belmont, a descendant of Trevor and Sypha from the original series, and Maria Renard during the French Revolution in 1792. It adapts material from the 1993 game Castlevania: Rondo of Blood and was produced without Warren Ellis's involvement.