Games related to Castlevania which might not actually have any direct references in them.

• Shaman King: Master of Spirits and Shaman King: Master of Spirits 2- Game adaptation done by Konami for the Shaman King manga. Done in the style of the Game Boy Advanced Castlevania games. While the enemies tend to be from Japanese mythology, the skeleton enemies can be recognized from Castlevania games, including a bomber skeleton and an archer skeleton. Some of the music has Castlevania-like melodies in them as well.
• Nanobreaker - A PS2 game created by Castlevania producer IGA. It uses the same engine as Castlevania: Lament of Innocence and was used in part to give the Castlevania team more experience with 3D games before the release of their next 3D project, Castlevania: Curse of Darkness.
• Rusty - A Castlevania-like game that was not produced by Konami that seems to be related to Castlevania: Rondo of Blood.