Attack on Titan 1×15 Reaction Fate/Zero is basically the prequel to all of them Fate/Stay Night, Fate/UBW, Fate/Heaven's Feel Zero is the 4th War The other three are 5th War, that Fate Zero is the prequel series to Fate Stay Night It follows a different war for the Holy Grail using several of the classes from the Fate Stay Night series
Anime Club Fate Zero Special Rewatch 14 16 Spoilers Anime