Night Warriors: Darkstalkers' Revenge (known in Japan as Vampire Hunter: The Animated Series) is a four-part OVA adaptation of the first two Darkstalkers video games, produced in 1997 by Madhouse and DR Movie.
The plot essentially follows that of its namesake video game: an alien demon known as Pyron invades Earth, while in the midst the vampire Demitri Maximoff and succubus Morrigan Aensland duke it out to see who's the strongest, Hsien-Ko and her sister Mei-Ling search for a way to free their mother's soul, Donovan Baine walks the earth fighting the forces of the dark with Anita by his side, and the long dormant Huitzil robots awaken and set their sights on exterminating humans and Darkstalkers alike.
The OVA was initially released in America on VHS and DVD by Viz Video and Pioneer, with an English dub by The Ocean Group, before going out of print. It has since been licensed and rereleased on DVD by Discotek Media.
This OVA contains examples of:
- Adaptational Heroism: One of the few instances where Lord Raptor is not portrayed as villainous (he saves Felicia from members of the church who tried to kill her), though even here he's an anti-hero at best.
- Animated Adaptation: The second one of Darkstalkers, after the So Bad, It's Good american cartoon by Graz Entertainment.
- Behemoth Battle: The final battle with Pyron involves both a giant Huitzil robot and a Kaiju-sized Pyron.
- Big Bad: Pyron, as in the video games.
- Break the Cutie: Anita cries twice through the series, once when Hsien-Ko and Mei-Ling go to fight Pyron, and again when Pyron mortally wounds Donovan.
- Conspicuous CG: A couple effects stand out in the fourth episode, such as Donovan's Blizzard Sword.
- Demoted to Extra: Anakaris, Rikuo, Sasquatch, and Victor are only given cameos in the final episode, where they get annihilated by Pyron.
- While not reduced to simply cameos, Lord Raptor and Jon Talbain are rather inconsequential to the plot, only showing up as One Scene Wonders in the second and third episodes, respectively.
- Everyone Has Standards: Lord Raptor takes umbrage with the church members attacking Felicia at his concert.Lord Raptor: No mercy for women or furry animals, is that it?
- Fantastic Racism: Humans are shown to fear and despise the Darkstalkers. The same applies vice versa if Jon Talbain is any indication.
- Fire-Breathing Weapon: At Lord Raptor's concert, instead of regular audience members, he finds church goers wielding flamethrowers (as well as garlic and silver bullets).
- Heel–Face Turn: Bishamon after his fight with Donovan.
- Humans Are Flawed: Humans are arguably shown at both their worst and their best. Many times the Darkstalkers are discriminated against by humans, but some humans are willing to help, such as the doctor who helps Felicia after her encounter with the Huitzil.
- Instant Awesome: Just Add Mecha!: A giant Huitzil robot emerges in the fourth episode to do battle with Pyron, who grows large in return.
- Mercy Kill: A priest attempts to do this with Anita, since her powers result in other humans shunning her and he believes that death would be a better alternative than letting her live on in suffering. In the end, he can't go through with it, and Anita instead goes with Donovan.
- Ms. Fanservice: Morrigan and Felicia, as usual.
- Off-Model: The Huitzil robots appear with the character's alternate grey palette instead of the usual gold.
- The giant Huitzil is gold during his introduction scene, only to somehow be grey when he shows up to fight Pyron.
- Stripperific: Morrigan and Felicia again, with the former even sometimes wearing casual attire that fits this trope.
- Villainous B.S.O.D.: Hannya suffers this during the battle with Donovan, when the latter helps some humans who are about to fall off a cliff, as he cannot fathom why Donovan, who is half-Darkstalker, would bother helping humans at all.
- When She Smiles: Anita when Donovan defeats Pyron.