Modder Batandy has released a new version of his standalone Castlevania mod for GZDoom, Castlevania: Simons Destiny. Castlevania : Simons Destiny is a standalone non-profit GZDOOM based fan game born as a love letter to this legendary franchise.
Source: N4G PC New version released for free standalone Castlevania fan game, Castlevania: Simon's Destiny