Fate/Extella: The Umbral Star is an action game from Marvelous and the third installment in the Fate/ series. It is the second game to be released outside of Japan, after Fate/Extra. The game's plot involved the conflict between two factions led by Nero and Tamano from Fate/Extra fighting each other over control of the Moon Cell and the Holy Grail. They are soon joined by a third faction led by Altera soon joins the fight with the intent of destroying civilization as well as Saber from Fate/stay night who wishes to stop the conflict between the three factions.