The bad guys could have been nutbars, murderous ex students or zombies... They're THAT generic.
Worse, the premise of the bad guys ALWAYS being behind their victims... It's like none of the characters ever heard of "the second Raptor" (Jurassic Park reference for those unfamiliar... Which shouldn't be many by this point!).
The cops who show up, could have been extras from ANY horror movie. Somethings going wrong, what should we do first off, split up. Duh.
Definitely a gore-fest. VERY formulaic. It's too bad, as the actors could have done SO much better, if the director would have actually put some serious effort into storyline instead of the gore factor.
The ending was the only bit that came across as realistic. In a human sense, if not a movie ending sense.