Castlevania Retrospective: 8-bit days
Covers the first 3 Castlevania games on the NES, as well as Vampire Killer, The Adventure and Belmont's Revenge.
Castlevania Retrospective Part 2: 16-bit days
Covers both Castlevania games from the SNES, as well as the 1993 remake, Rondo of Blood, and Bloodlines.
Castlevania Retrospective Part 3: Symphony of the Night
Mostly covers Castlevania: Symphony of the Night, as well as Legends, and some of the GBA and DS games.