Not as violent as the second part, but there is enough blood here to warrant an "R" rating.
A dead body is shown right in the beginning of the movie.
One character has a wide variety of blades sprout out of his body, with plenty of blood. Another character fights him and gets pierced by said blades repeatedly.
A character is very suddenly cut to pieces, with lots of blood spraying everywhere.
A battle between two characters, which results in one getting cut up, only to regenerate before being stabbed through with plenty of blood spraying.