These days many people just do not enjoy “The Blair Witch,” and that’s a shame. I still love the movie, and I still think it’s a frightening simplistic horror film about curiosity killing the cat. But in a day and age where gore is on the menu, it’s not hard to fathom why it’d be disliked. “Altered” is an admirable if flawed follow-up from the “Blair Witch” boys that is much different in every sense. Gore and guts are present, as well as a fairly simplistic alien carnage story. Ah, the joys of being a horror fanatic. “Altered” is a good old fashioned horror film, and one that relies on the conventions of typical claustrophobic horror fare to get us through.