Ok, let me put more detail in my narrative.
1. DC-Fan - comic relief, complaining about every silly little thing. Killed off early.
2. thenewnexus and summers8 - emo characters, overly pessimistic. Predicting the worst possible death for everyone. Killed off fairly early.
3. King Kong Brady - stereotypical loud-mouthed jock. Picks up a baseball bat and tries to fight the horror on his own... ends up getting killed in one of the grizzliest scenes midway through the movie.
4. Hauntedknight and Salzmank - peacekeepers, tries to keep everyone to work together. Slowly starts getting stressed more and more throughout the movie till they break, possibly being the cause of other people's deaths. Only one of them has a chance at surviving, but not without being severely traumatized.
5. Tristan - cranky old man, has no problems saying mean things to anyone he dislikes. Everyone thinks he's the killer.... but turns out he isn't. Survives till late in the movie then has one of the more brutal deaths.
6. Lord Death Man - laid back guy, keeps telling people to chill. Prefers to get drunk on a bottle and laughs at everyone's death. Has a decent chance at being one of the survivors.... or just falls into a hole and breaks his neck.
7. The Ackbars - cheerleading squad. Most of them are killed off randomly throughout the movie. One of them has the chance to be the movie's leading man/lady and survive till the end. One of them is probably the killer, or at the very least gets possessed by the horror and becomes its avatar.
8. JudgeJosephDredd - straight A character. Always tries to do the right thing even if it makes him a bit preachy. Has a chance at being a survivor... or gets murdered by one of the other people.
9. Coldenfield - wild card. Can die early, can survive, can ally with the horror to kill off people, can backstab others to save himself, can end up helping others when needed. Unknown entity.
10. Seahawkskraawk00 - jaded old police officer. Tries to take charge of the situation, calls out people acting unruly, is not above bullying people to get them in line. Probably gets killed with one of the others pushing him in front of the killer.
11. Merh - kindly older lady. Has a tattoo on her lower back speaking of a wilder youth. Is always ready to give words of wisdom or a smack on the head. Has a good chance of actually being the killer disguised in sheep's clothing.
Who else did I miss?