The most important thing about horror is the atmosphere.
And a main part of it is the music. So i suggest you look for some scary music
e.g. the epic resident evil one:
https://www.youtube.com/watch?v=EBGvtkVVas0&feature=related&hd=1
Left 4 Dead 2 music themes are also good for that kind of stuff. http://www.youtube.com/watch?v=yl6zl70eVok
what about kinda like what Werewolf trans. does and u dont know whose the killer till night time or something kinda like that?
Wc3 is not really good for scary cinematics, i have watched lots of horror cinematic and i didn't get scared.
I'd suggest limiting the number of jump scares, as that gets old fast.
Here's a good way to maintain tension: Make an enemy invisible, and the only way to detect it is through the sounds it makes. So as your character moves on, hearing the noise get closer and closer... THEN it attacks, preferably from behind.
If it's a first-person view, even better.
Alternatively, only its footsteps are heard.
mmm the classic invisible man lol i like
and my camera is 3rd person i think
Hmm i might be able to do a first person Camera for you? Though i must admit, first person isn't that great in warcraft. The reaction time is limited therefore making a "tense game" hard because of the limited view of sight. I mean admit it, even in oblivion you had to use third person to really grasp the whole scene. Anyhow im getting off topic, if you would like a first person camera, i have been working on a camera that would allowed first or third person view as well as regular game camera. The third person is pretty good, first person is hard to grasp because people want to see the weapon in the hand, shield, etc and to do that, it requires the camera to be very close to the model which shows the insides of the face during attacks. First person without the hands, weapon, shield, etc. is very easy but you don't get the same feeling as if you saw them but it looks better.