It was directed by Koji Igarashi, the acclaimed director of the namesake "Igavania" sub-genre of games. The game is perceived as an spiritual successor of other famous works by IGA, such as Castlevania: Symphony of the Night. As such, many enemies, areas, characters, and other elements are directly inspired from Castlevania games and from sources the series draws from.
- The team behind this game includes people who had major involvement on the development of numerous Castlevania titles:
- Koji Igarashi (IGA), who had worked on numerous Castlevania titles since Symphony of the Night (as the Assistant Director) and the Producer from Chronicles up to Harmony of Despair. He also appears as a secret DLC boss.
- Michiru Yamane, the principal composer and Sound Producer of Castlevania titles for more than a decade.
- Ayami Kojima, the illustrator / character designer of Castlevania games starting with Symphony of the Night.
- In its Kickstarter video, Koji Igarashi portrays Dracula, sits on a throne, and does the classic wine glass-throw as seen in Castlevania: Symphony of the Night. He also played the part of a vampire killer character holding a whip as a weapon in another promotional video.
- The game borrows many 2D role playing game elements featured in the Igavania titles, such as the overall platforming gameplay, layout of the maps, experience-based level-up system, and the ability to equip weapons. Recent updates also included the following elements, entities and features similar to some titles of the Castlevania series.
- The game's setting itself is similar to Dracula's Castle, but also features outside areas and alternate dimensions like some Castlevania games do.
- Enemies are based on supernatural entities such as monsters and other mythical creatures, a theme common in Castlevania lore. Some of them, mainly from the Ars Goetia and the Dictionnaire Infernal, appear in both series.
- The female playable character Miriam, bears a resemblance to Shanoa, particularly on the fact that she has glyph-like tattoos on her left shoulder and back.
- A gameplay mechanic that is referred to as the Invert shard enables the player to alter gravity by flipping their environments upside-down. It is an obvious allusion to the Reverse Castle in Symphony of the Night.
- Sitting at a piano with a fairy familiar will make Miriam play it. In the Japanese version of Symphony of the Night, sitting in a chair with a leveled-up fairy familiar would make the fairy sing a song.
- One of the villagers requests Miriam to kill certain types of enemies to avenge fallen villagers. Several of these villagers share names with Castlevania characters, especially Belmonts (for instance names include Trevor, Soleiyu, Julius, Simon, Grant and Sypha).
- Myriam's design and powers share similarities with Shanoa and Soma Cruz.
- Orlok Dracule, abbreviated as O.D., is a heavy homage to Alucard in many ways, as well as various other demons and vampires.
- His design is nearly identical to that off Alucard's, with long flowing hair, a cravat, a large cloak, and a sword. Further emphasizing this connection, his stance when confronting Miriam is identical to Alucard's default stance.
- His attacks include transforming into a bat and charging, transforming into a demonic hound, teleporting in the form of mist, slashing with his sword, firing a wave of fireballs, and grabbing Miriam to absorb her energy.
- O.D.'s middle name according to his character file is Fahrenheit, as is Alucard's.
- Orlok Dracule is named after Orlok, the vampire in the film Nosferatu, and Dracula, the titular vampire of Bram Stoker's novel.
- O.D. is voiced by Robert Belgrade in English and Ryōtarō Okiayu in Japanese, the same voice actors that portrayed Alucard in Symphony of the Night.
- O.D.'s role is similar to that of the Master Librarian's, being a friendly denizen of the castle that chooses to give Miriam items.
- O.D. sits above a hole that links to the room directly below. With either the Invert shard or High Jump, Miriam is able to lift up O.D., causing him to raise his arms in surprise and drop an item.
- Said item is a pair of Nose Glasses, which O.D. will don the next time Miriam visits him after his boss battle. These glasses are similar to that of the Nose Devil Familiar, exclusive to Japanese versions of Symphony of the Night.
- O.D. sits in the same manner as Alucard, leaning back with his legs crossed.
- O.D.'s unique ability, Standstill, allows him to freeze time. He uses this ability to throw ice shards, which suspend themselves in the air until time resumes. This maneuver is similar to that of JoJo's Bizarre Adventure antagonist DIO, and by extension Zephyr, who also is an homage to the villain. The visualization of stopped time is similar to the Time Stop soul and the Stopwatch.
- The sound effect used is nearly identical to that of DIO's timestop in the anime adaptation of Stardust Crusaders.
- O.D. is pronounced "Dio" but with the syllables reversed, similar to how Alucard is Dracula reversed.
- Gremory fulfills a similar role to Death, particularly in his Portrait of Ruin role. She works to resurrect her master and uses cresent moons that slowly home in on Miriam, working identically to Death's sickles.
- Zangetsu is initally hostile toward Miriam due to her Shardbinder background, but later trusts her as the game goes on. The second battle has Miriam remark that Zangetsu could have defeated her if he so desired, but instead held back. This mirrors Julius Belmont and Soma Cruz's relationship, with his Zangetsuto blade even fulfilling a similar role as to that of the Vampire Killer.