After Labor Day, the horror genre takes center stage — especially on Netflix. The popular streamer is adding more great horror films in September that will keep you up all night. Some new additions this month include Unfriended, a screenlife thriller with a fresh rating on Rotten Tomatoes, and Valentine, the trashy B-grade flick with Angel’s David Boreanaz and Grey’s Anatomy’s Katherine Heigl. Need more recommendations? Then check out the Great Movies on Amazon Prime Video Right Now, Best Action Movies on Netflix Right Now and Best Rom-Coms on Netflix Right Now.