This movie is more on the science fiction side of things, but since the aliens in this movie inhabit the bodies of the recently dead, forcing them to walk around like zombies and attack the human population, it sits directly in the horror camp for me. Speaking of "camp," this movie is definitely campy and silly, but the lumbering reanimated corpses are creepy when they appear. Of course, the plot is pretty threadbare (why did the aliens pick that one scientist to warn the whole world about their invasion? Then they had to resort to plan B when people didn't listen, which was taking over more dead bodies and warning people through the hijacking of various news and sports broadcasts...why didn't they just do that in the first place? And WTF are the sound waves that wind up defeating them again? Huh?) Ultimately it doesn't make much sense, but it's not too long, so the pain is over quickly, and like I said, lumbering corpses, which are pretty cool.