A lot of the kills are instant some contain blood, others are offscreen not very graphic for the 80s.
Very little. Most murders are barely seen or shadowed, very minimal blood. Really no other violence, besides a fake shoot out and kidnapping, which appears real, a fight between the killer and a boy, and jocks grabbing a boy and tuning him to a tree.
A couple who are making out in their car are interrupted. The man is pulled from the car and stabbed repeatedly. The killer then moves in on the woman as the scene ends.
A van full of hooded men with guns stops outside the campus and the men start shooting people. They then pick up the people they shot and load them into the van and drive away. Even though we learn this is a prank it could still be very disturbing to some.
A man (stripped down to his underwear by friends) is tied to a tree as part of a prank. When he is alone the killer shows up and frees him only to stab him to death seconds later.
A woman is grabbed and killed.
A jock has his arm broken by the killer and he is beaten and then stangled in exercise equipment.
A man is stabbed after finding his friend's lifeless upside down body.
The killer punches through a door and grabs a man then kills him offscreen. We see the result later.
A campus security guard is in his truck but doesn't respond when a woman asks for help. He appears to be dead.
A woman is stabbed.