ep 00 out

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Do I need to watch other stuff to understand?

No and most people recommend you start with this one

Dayum. 47 minutes of waifu time. What a pleasant surprise.

can someone confirm this? its been too long i forgot

fate / zero = season 1
fate stay night UBW = season 2

fate stay night UBW (2014) = reanimation of season 2?

The original animated UBW was actually a movie animated by DEEN. Animated rather poorly I might add, despite being a movie.
So yes, this is a reanimation of season 2, not limited by movie length, and with the dominant studio ufotable.

fate/zero then fate/stay night

is how the order supposed to be

fate/stay night has 3 routes UBW is just one of them

like stated UBW was made into a shitty movie theyre redoing it as a whole series with a whole better tier of animation cause ufotable

seibah is a god