Also chronologisch musst du es in folgender Reihenfolge gucken: Fate/Zero

Fate/stay night (2006) aka "Fate Route"

Fate/stay night: Unlimited Blade Works (2014)

Fate/stay night: Heaven's Feel I. presage flower

Fate/stay night: Heaven's Feel II. lost butterfly

Fate/stay night: Heaven's Feel III. spring song