There's no hiding Vampire Survivors’ links to Castlevania. The developer Luca Galante was even accused of ripping off certain Castlevania sprites during development (but these were from asset packs, not ripped from the game directly, so put down your pitchforks). And when Vampire Survivors: Ode to Castlevania was announced as DLC, Galante made it clear just how important the series was in his success story...
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Vampire Survivors’ Castlevania DLC map is so big that I keep getting lost, but I'd do it all over again just to have Sonia Belmont's sonic whip
Source: PC Gamer (opens in a new tab)