The violence in this movie is extremely graphic in nature. It may be upsetting to some viewers. People are killed in many ways in this movie. Shot, stabbed, scalped, cut, beaten, among many other gruesome acts of violence.
It's also not particularly scary, although Art and his imaginary friend (it'll make sense when you see it) can be unsettling. The intensity comes from the gore, rather than any tense set pieces. If you've got the stomach for it, Terrifier 2 will be more of a treat than a trick for gorehounds this Halloween.