Night Warriors: Darkstalkers’ Revenge is a four-episode OVA anime series by Madhouse Studios under license from Capcom, directed by Masashi Ikeda and originally released in 1997–1998. It is an adaptation of Capcom’s Darkstalkers series of video games.
In the midst of a war between the families of Demitri Maximoff and Morrigan Aensland for control of the Demon World, alien invader Pyron arrives on Earth and plans to take it over by taking out those who stand a chance of stopping him, namely the Darkstalkers. Meanwhile, dhampir Donovan Baine seeks to rid himself of the cursed blood which runs through his veins.
Four of the original Darkstalkers, Anakaris, Rikuo, Sasquatch and Victor, were featured in the intro but not in the OVA’s main storyline, apparently having been killed by Pyron in a flashback sequence shown in the beginning of the fourth episode.